diff --git a/src/ai/ai_gui.cpp b/src/ai/ai_gui.cpp
index 5e0c720f00..c4a8667620 100644
--- a/src/ai/ai_gui.cpp
+++ b/src/ai/ai_gui.cpp
@@ -1332,7 +1332,7 @@ struct AIDebugWindow : public Window {
 						}
 						if (all_unpaused) {
 							/* All scripts have been unpaused => unpause the game. */
-							Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {});
+							Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, false);
 						}
 					}
 				}
@@ -1381,7 +1381,7 @@ struct AIDebugWindow : public Window {
 
 					/* Pause the game. */
 					if ((_pause_mode & PM_PAUSED_NORMAL) == PM_UNPAUSED) {
-						Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
+						Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 					}
 
 					/* Highlight row that matched */
diff --git a/src/autoreplace_gui.cpp b/src/autoreplace_gui.cpp
index 00eba4044b..4dae0eedc7 100644
--- a/src/autoreplace_gui.cpp
+++ b/src/autoreplace_gui.cpp
@@ -547,7 +547,7 @@ public:
 					Command<CMD_SET_GROUP_FLAG>::Post(this->sel_group, GroupFlags::GF_REPLACE_WAGON_REMOVAL, !HasBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL), _ctrl_pressed);
 				} else {
 					// toggle renew_keep_length
-					Command<CMD_CHANGE_COMPANY_SETTING>::Post(0, 0, Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1, "company.renew_keep_length");
+					Command<CMD_CHANGE_COMPANY_SETTING>::Post("company.renew_keep_length", Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1);
 				}
 				break;
 			}
diff --git a/src/cheat_gui.cpp b/src/cheat_gui.cpp
index fcc9a3ef07..eb62dc0317 100644
--- a/src/cheat_gui.cpp
+++ b/src/cheat_gui.cpp
@@ -55,7 +55,7 @@ static int32 _money_cheat_amount = 10000000;
  */
 static int32 ClickMoneyCheat(int32 p1, int32 p2)
 {
-	Command<CMD_MONEY_CHEAT>::Post(0, (uint32)(p2 * _money_cheat_amount), 0, {});
+	Command<CMD_MONEY_CHEAT>::Post(p2 * _money_cheat_amount);
 	return _money_cheat_amount;
 }
 
diff --git a/src/command_type.h b/src/command_type.h
index 59331dc7cc..0424782a23 100644
--- a/src/command_type.h
+++ b/src/command_type.h
@@ -404,26 +404,6 @@ enum CommandPauseLevel {
 	CMDPL_ALL_ACTIONS,     ///< All actions may be executed.
 };
 
-/**
- * Defines the callback type for all command handler functions.
- *
- * This type defines the function header for all functions which handles a CMD_* command.
- * A command handler use the parameters to act according to the meaning of the command.
- * The tile parameter defines the tile to perform an action on.
- * The flag parameter is filled with flags from the DC_* enumeration. The parameters
- * p1 and p2 are filled with parameters for the command like "which road type", "which
- * order" or "direction". Each function should mentioned in there doxygen comments
- * the usage of these parameters.
- *
- * @param tile The tile to apply a command on
- * @param flags Flags for the command, from the DC_* enumeration
- * @param p1 Additional data for the command
- * @param p2 Additional data for the command
- * @param text Additional text
- * @return The CommandCost of the command, which can be succeeded or failed.
- */
-typedef CommandCost CommandProc(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text);
-
 
 template <typename T> struct CommandFunctionTraitHelper;
 template <typename... Targs>
diff --git a/src/company_cmd.cpp b/src/company_cmd.cpp
index 87231f3eb6..016a830bf9 100644
--- a/src/company_cmd.cpp
+++ b/src/company_cmd.cpp
@@ -916,16 +916,11 @@ CommandCost CmdCompanyCtrl(DoCommandFlag flags, CompanyCtrlAction cca, CompanyID
 /**
  * Change the company manager's face.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 unused
- * @param p2 face bitmasked
- * @param text unused
+ * @param cmf face bitmasked
  * @return the cost of this operation or an error
  */
-CommandCost CmdSetCompanyManagerFace(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdSetCompanyManagerFace(DoCommandFlag flags, CompanyManagerFace cmf)
 {
-	CompanyManagerFace cmf = (CompanyManagerFace)p2;
-
 	if (!IsValidCompanyManagerFace(cmf)) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
@@ -938,20 +933,13 @@ CommandCost CmdSetCompanyManagerFace(DoCommandFlag flags, TileIndex tile, uint32
 /**
  * Change the company's company-colour
  * @param flags operation to perform
- * @param tile unused
- * @param p1 bitstuffed:
- * p1 bits 0-7 scheme to set
- * p1 bit 8 set first/second colour
- * @param p2 new colour for vehicles, property, etc.
- * @param text unused
+ * @param scheme scheme to set
+ * @param primary set first/second colour
+ * @param colour new colour for vehicles, property, etc.
  * @return the cost of this operation or an error
  */
-CommandCost CmdSetCompanyColour(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdSetCompanyColour(DoCommandFlag flags, LiveryScheme scheme, bool primary, Colours colour)
 {
-	Colours colour = Extract<Colours, 0, 8>(p2);
-	LiveryScheme scheme = Extract<LiveryScheme, 0, 8>(p1);
-	bool second = HasBit(p1, 8);
-
 	if (scheme >= LS_END || (colour >= COLOUR_END && colour != INVALID_COLOUR)) return CMD_ERROR;
 
 	/* Default scheme can't be reset to invalid. */
@@ -960,14 +948,14 @@ CommandCost CmdSetCompanyColour(DoCommandFlag flags, TileIndex tile, uint32 p1,
 	Company *c = Company::Get(_current_company);
 
 	/* Ensure no two companies have the same primary colour */
-	if (scheme == LS_DEFAULT && !second) {
+	if (scheme == LS_DEFAULT && primary) {
 		for (const Company *cc : Company::Iterate()) {
 			if (cc != c && cc->colour == colour) return CMD_ERROR;
 		}
 	}
 
 	if (flags & DC_EXEC) {
-		if (!second) {
+		if (primary) {
 			if (scheme != LS_DEFAULT) SB(c->livery[scheme].in_use, 0, 1, colour != INVALID_COLOUR);
 			if (colour == INVALID_COLOUR) colour = (Colours)c->livery[LS_DEFAULT].colour1;
 			c->livery[scheme].colour1 = colour;
@@ -1051,13 +1039,10 @@ static bool IsUniqueCompanyName(const std::string &name)
 /**
  * Change the name of the company.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 unused
- * @param p2 unused
  * @param text the new name or an empty string when resetting to the default
  * @return the cost of this operation or an error
  */
-CommandCost CmdRenameCompany(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdRenameCompany(DoCommandFlag flags, const std::string &text)
 {
 	bool reset = text.empty();
 
@@ -1097,13 +1082,10 @@ static bool IsUniquePresidentName(const std::string &name)
 /**
  * Change the name of the president.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 unused
- * @param p2 unused
  * @param text the new name or an empty string when resetting to the default
  * @return the cost of this operation or an error
  */
-CommandCost CmdRenamePresident(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdRenamePresident(DoCommandFlag flags, const std::string &text)
 {
 	bool reset = text.empty();
 
@@ -1121,7 +1103,7 @@ CommandCost CmdRenamePresident(DoCommandFlag flags, TileIndex tile, uint32 p1, u
 			c->president_name = text;
 
 			if (c->name_1 == STR_SV_UNNAMED && c->name.empty()) {
-				Command<CMD_RENAME_COMPANY>::Do(DC_EXEC, 0, 0, 0, text + " Transport");
+				Command<CMD_RENAME_COMPANY>::Do(DC_EXEC, text + " Transport");
 			}
 		}
 
@@ -1182,19 +1164,16 @@ uint32 CompanyInfrastructure::GetTramTotal() const
  * companies if you have paid off your loan (either explicitly, or implicitly
  * given the fact that you have more money than loan).
  * @param flags operation to perform
- * @param tile unused
- * @param p1 the amount of money to transfer; max 20.000.000
- * @param p2 the company to transfer the money to
- * @param text unused
+ * @param money the amount of money to transfer; max 20.000.000
+ * @param dest_company the company to transfer the money to
  * @return the cost of this operation or an error
  */
-CommandCost CmdGiveMoney(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdGiveMoney(DoCommandFlag flags, uint32 money, CompanyID dest_company)
 {
 	if (!_settings_game.economy.give_money) return CMD_ERROR;
 
 	const Company *c = Company::Get(_current_company);
-	CommandCost amount(EXPENSES_OTHER, std::min<Money>(p1, 20000000LL));
-	CompanyID dest_company = (CompanyID)p2;
+	CommandCost amount(EXPENSES_OTHER, std::min<Money>(money, 20000000LL));
 
 	/* You can only transfer funds that is in excess of your loan */
 	if (c->money - c->current_loan < amount.GetCost() || amount.GetCost() < 0) return_cmd_error(STR_ERROR_INSUFFICIENT_FUNDS);
diff --git a/src/company_cmd.h b/src/company_cmd.h
index 107a77f29c..5ffac5cbde 100644
--- a/src/company_cmd.h
+++ b/src/company_cmd.h
@@ -11,15 +11,18 @@
 #define COMPANY_CMD_H
 
 #include "command_type.h"
+#include "company_type.h"
+#include "livery.h"
 
 enum ClientID : uint32;
+enum Colours : byte;
 
 CommandCost CmdCompanyCtrl(DoCommandFlag flags, CompanyCtrlAction cca, CompanyID company_id, CompanyRemoveReason reason, ClientID client_id);
-CommandProc CmdGiveMoney;
-CommandProc CmdRenameCompany;
-CommandProc CmdRenamePresident;
-CommandProc CmdSetCompanyManagerFace;
-CommandProc CmdSetCompanyColour;
+CommandCost CmdGiveMoney(DoCommandFlag flags, uint32 money, CompanyID dest_company);
+CommandCost CmdRenameCompany(DoCommandFlag flags, const std::string &text);
+CommandCost CmdRenamePresident(DoCommandFlag flags, const std::string &text);
+CommandCost CmdSetCompanyManagerFace(DoCommandFlag flags, CompanyManagerFace cmf);
+CommandCost CmdSetCompanyColour(DoCommandFlag flags, LiveryScheme scheme, bool primary, Colours colour);
 
 DEF_CMD_TRAIT(CMD_COMPANY_CTRL,             CmdCompanyCtrl,           CMD_SPECTATOR | CMD_CLIENT_ID | CMD_NO_EST, CMDT_SERVER_SETTING)
 DEF_CMD_TRAIT(CMD_GIVE_MONEY,               CmdGiveMoney,             0,                                          CMDT_MONEY_MANAGEMENT)
diff --git a/src/company_gui.cpp b/src/company_gui.cpp
index 7e65b43ac2..66ef1a9898 100644
--- a/src/company_gui.cpp
+++ b/src/company_gui.cpp
@@ -440,11 +440,11 @@ struct CompanyFinancesWindow : Window {
 				break;
 
 			case WID_CF_INCREASE_LOAN: // increase loan
-				Command<CMD_INCREASE_LOAN>::Post(STR_ERROR_CAN_T_BORROW_ANY_MORE_MONEY, 0, 0, _ctrl_pressed, {});
+				Command<CMD_INCREASE_LOAN>::Post(STR_ERROR_CAN_T_BORROW_ANY_MORE_MONEY, _ctrl_pressed ? LoanCommand::Max : LoanCommand::Interval, 0);
 				break;
 
 			case WID_CF_REPAY_LOAN: // repay loan
-				Command<CMD_DECREASE_LOAN>::Post(STR_ERROR_CAN_T_REPAY_LOAN, 0, 0, _ctrl_pressed, {});
+				Command<CMD_DECREASE_LOAN>::Post(STR_ERROR_CAN_T_REPAY_LOAN, _ctrl_pressed ? LoanCommand::Max : LoanCommand::Interval, 0);
 				break;
 
 			case WID_CF_INFRASTRUCTURE: // show infrastructure details
@@ -1000,7 +1000,7 @@ public:
 			for (LiveryScheme scheme = LS_DEFAULT; scheme < LS_END; scheme++) {
 				/* Changed colour for the selected scheme, or all visible schemes if CTRL is pressed. */
 				if (HasBit(this->sel, scheme) || (_ctrl_pressed && _livery_class[scheme] == this->livery_class && HasBit(_loaded_newgrf_features.used_liveries, scheme))) {
-					Command<CMD_SET_COMPANY_COLOUR>::Post(0, scheme | (widget == WID_SCL_PRI_COL_DROPDOWN ? 0 : 256), index, {});
+					Command<CMD_SET_COMPANY_COLOUR>::Post(scheme, widget == WID_SCL_PRI_COL_DROPDOWN, (Colours)index);
 				}
 			}
 		} else {
@@ -1586,7 +1586,7 @@ public:
 
 			/* OK button */
 			case WID_SCMF_ACCEPT:
-				Command<CMD_SET_COMPANY_MANAGER_FACE>::Post(0, 0, this->face, {});
+				Command<CMD_SET_COMPANY_MANAGER_FACE>::Post(this->face);
 				FALLTHROUGH;
 
 			/* Cancel button */
@@ -2581,11 +2581,11 @@ struct CompanyWindow : Window
 				break;
 
 			case WID_C_BUY_SHARE:
-				Command<CMD_BUY_SHARE_IN_COMPANY>::Post(STR_ERROR_CAN_T_BUY_25_SHARE_IN_THIS, 0, this->window_number, 0, {});
+				Command<CMD_BUY_SHARE_IN_COMPANY>::Post(STR_ERROR_CAN_T_BUY_25_SHARE_IN_THIS, (CompanyID)this->window_number);
 				break;
 
 			case WID_C_SELL_SHARE:
-				Command<CMD_SELL_SHARE_IN_COMPANY>::Post(STR_ERROR_CAN_T_SELL_25_SHARE_IN, 0, this->window_number, 0, {});
+				Command<CMD_SELL_SHARE_IN_COMPANY>::Post(STR_ERROR_CAN_T_SELL_25_SHARE_IN, (CompanyID)this->window_number);
 				break;
 
 			case WID_C_COMPANY_PASSWORD:
@@ -2640,16 +2640,16 @@ struct CompanyWindow : Window
 				Money money = (Money)(strtoull(str, nullptr, 10) / _currency->rate);
 				uint32 money_c = Clamp(ClampToI32(money), 0, 20000000); // Clamp between 20 million and 0
 
-				Command<CMD_GIVE_MONEY>::Post(STR_ERROR_CAN_T_GIVE_MONEY, 0, money_c, this->window_number, {});
+				Command<CMD_GIVE_MONEY>::Post(STR_ERROR_CAN_T_GIVE_MONEY, money_c, (CompanyID)this->window_number);
 				break;
 			}
 
 			case WID_C_PRESIDENT_NAME:
-				Command<CMD_RENAME_PRESIDENT>::Post(STR_ERROR_CAN_T_CHANGE_PRESIDENT, 0, 0, 0, str);
+				Command<CMD_RENAME_PRESIDENT>::Post(STR_ERROR_CAN_T_CHANGE_PRESIDENT, str);
 				break;
 
 			case WID_C_COMPANY_NAME:
-				Command<CMD_RENAME_COMPANY>::Post(STR_ERROR_CAN_T_CHANGE_COMPANY_NAME, 0, 0, 0, str);
+				Command<CMD_RENAME_COMPANY>::Post(STR_ERROR_CAN_T_CHANGE_COMPANY_NAME, str);
 				break;
 
 			case WID_C_COMPANY_JOIN:
@@ -2776,7 +2776,7 @@ struct BuyCompanyWindow : Window {
 				break;
 
 			case WID_BC_YES:
-				Command<CMD_BUY_COMPANY>::Post(STR_ERROR_CAN_T_BUY_COMPANY, 0, this->window_number, 0, {});
+				Command<CMD_BUY_COMPANY>::Post(STR_ERROR_CAN_T_BUY_COMPANY, (CompanyID)this->window_number);
 				break;
 		}
 	}
diff --git a/src/console_cmds.cpp b/src/console_cmds.cpp
index 9e244dd439..7f663fe863 100644
--- a/src/console_cmds.cpp
+++ b/src/console_cmds.cpp
@@ -632,7 +632,7 @@ DEF_CONSOLE_CMD(ConPauseGame)
 	}
 
 	if ((_pause_mode & PM_PAUSED_NORMAL) == PM_UNPAUSED) {
-		Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
+		Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 		if (!_networking) IConsolePrint(CC_DEFAULT, "Game paused.");
 	} else {
 		IConsolePrint(CC_DEFAULT, "Game is already paused.");
@@ -654,7 +654,7 @@ DEF_CONSOLE_CMD(ConUnpauseGame)
 	}
 
 	if ((_pause_mode & PM_PAUSED_NORMAL) != PM_UNPAUSED) {
-		Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {});
+		Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, false);
 		if (!_networking) IConsolePrint(CC_DEFAULT, "Game unpaused.");
 	} else if ((_pause_mode & PM_PAUSED_ERROR) != PM_UNPAUSED) {
 		IConsolePrint(CC_DEFAULT, "Game is in error state and cannot be unpaused via console.");
diff --git a/src/core/overflowsafe_type.hpp b/src/core/overflowsafe_type.hpp
index 29aab175b3..14f0eaa7a7 100644
--- a/src/core/overflowsafe_type.hpp
+++ b/src/core/overflowsafe_type.hpp
@@ -39,9 +39,10 @@ public:
 	constexpr OverflowSafeInt() : m_value(0) { }
 
 	constexpr OverflowSafeInt(const OverflowSafeInt& other) : m_value(other.m_value) { }
-	constexpr OverflowSafeInt(const int64 int_) : m_value(int_) { }
+	constexpr OverflowSafeInt(const T int_) : m_value(int_) { }
 
 	inline constexpr OverflowSafeInt& operator = (const OverflowSafeInt& other) { this->m_value = other.m_value; return *this; }
+	inline constexpr OverflowSafeInt& operator = (T other) { this->m_value = other; return *this; }
 
 	inline constexpr OverflowSafeInt operator - () const { return OverflowSafeInt(this->m_value == T_MIN ? T_MAX : -this->m_value); }
 
@@ -174,7 +175,7 @@ public:
 	inline constexpr bool operator <  (const int other) const { return !(*this >= other); }
 	inline constexpr bool operator <= (const int other) const { return !(*this > other); }
 
-	inline constexpr operator int64 () const { return this->m_value; }
+	inline constexpr operator T () const { return this->m_value; }
 };
 
 
diff --git a/src/economy.cpp b/src/economy.cpp
index 5c7c2cee51..6fb3d2795d 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -315,7 +315,7 @@ void ChangeOwnershipOfCompanyItems(Owner old_owner, Owner new_owner)
 			for (i = 0; i < 4; i++) {
 				if (c->share_owners[i] == old_owner) {
 					/* Sell its shares */
-					CommandCost res = Command<CMD_SELL_SHARE_IN_COMPANY>::Do(DC_EXEC | DC_BANKRUPT, 0, c->index, 0, {});
+					CommandCost res = Command<CMD_SELL_SHARE_IN_COMPANY>::Do(DC_EXEC | DC_BANKRUPT, c->index);
 					/* Because we are in a DoCommand, we can't just execute another one and
 					 *  expect the money to be removed. We need to do it ourself! */
 					SubtractMoneyFromCompany(res);
@@ -335,7 +335,7 @@ void ChangeOwnershipOfCompanyItems(Owner old_owner, Owner new_owner)
 			} else {
 				cur_company2.Change(c->share_owners[i]);
 				/* Sell the shares */
-				CommandCost res = Command<CMD_SELL_SHARE_IN_COMPANY>::Do(DC_EXEC | DC_BANKRUPT, 0, old_owner, 0, {});
+				CommandCost res = Command<CMD_SELL_SHARE_IN_COMPANY>::Do(DC_EXEC | DC_BANKRUPT, old_owner);
 				/* Because we are in a DoCommand, we can't just execute another one and
 				 *  expect the money to be removed. We need to do it ourself! */
 				SubtractMoneyFromCompany(res);
@@ -2013,16 +2013,12 @@ extern int GetAmountOwnedBy(const Company *c, Owner owner);
 /**
  * Acquire shares in an opposing company.
  * @param flags type of operation
- * @param tile unused
  * @param p1 company to buy the shares from
- * @param p2 unused
- * @param text unused
  * @return the cost of this operation or an error
  */
-CommandCost CmdBuyShareInCompany(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdBuyShareInCompany(DoCommandFlag flags, TileIndex tile, CompanyID target_company)
 {
 	CommandCost cost(EXPENSES_OTHER);
-	CompanyID target_company = (CompanyID)p1;
 	Company *c = Company::GetIfValid(target_company);
 
 	/* Check if buying shares is allowed (protection against modified clients)
@@ -2065,15 +2061,11 @@ CommandCost CmdBuyShareInCompany(DoCommandFlag flags, TileIndex tile, uint32 p1,
 /**
  * Sell shares in an opposing company.
  * @param flags type of operation
- * @param tile unused
- * @param p1 company to sell the shares from
- * @param p2 unused
- * @param text unused
+ * @param target_company company to sell the shares from
  * @return the cost of this operation or an error
  */
-CommandCost CmdSellShareInCompany(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdSellShareInCompany(DoCommandFlag flags, CompanyID target_company)
 {
-	CompanyID target_company = (CompanyID)p1;
 	Company *c = Company::GetIfValid(target_company);
 
 	/* Cannot sell own shares */
@@ -2106,15 +2098,11 @@ CommandCost CmdSellShareInCompany(DoCommandFlag flags, TileIndex tile, uint32 p1
  * that company.
  * @todo currently this only works for AI companies
  * @param flags type of operation
- * @param tile unused
- * @param p1 company to buy up
- * @param p2 unused
- * @param text unused
+ * @param target_company company to buy up
  * @return the cost of this operation or an error
  */
-CommandCost CmdBuyCompany(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdBuyCompany(DoCommandFlag flags, CompanyID target_company)
 {
-	CompanyID target_company = (CompanyID)p1;
 	Company *c = Company::GetIfValid(target_company);
 	if (c == nullptr) return CMD_ERROR;
 
diff --git a/src/economy_cmd.h b/src/economy_cmd.h
index f182af81f2..e5cc282c99 100644
--- a/src/economy_cmd.h
+++ b/src/economy_cmd.h
@@ -11,10 +11,11 @@
 #define ECONOMY_CMD_H
 
 #include "command_type.h"
+#include "company_type.h"
 
-CommandProc CmdBuyShareInCompany;
-CommandProc CmdSellShareInCompany;
-CommandProc CmdBuyCompany;
+CommandCost CmdBuyShareInCompany(DoCommandFlag flags, TileIndex tile, CompanyID target_company);
+CommandCost CmdSellShareInCompany(DoCommandFlag flags, CompanyID target_company);
+CommandCost CmdBuyCompany(DoCommandFlag flags, CompanyID target_company);
 
 DEF_CMD_TRAIT(CMD_BUY_SHARE_IN_COMPANY,  CmdBuyShareInCompany,  0, CMDT_MONEY_MANAGEMENT)
 DEF_CMD_TRAIT(CMD_SELL_SHARE_IN_COMPANY, CmdSellShareInCompany, 0, CMDT_MONEY_MANAGEMENT)
diff --git a/src/fios_gui.cpp b/src/fios_gui.cpp
index 73315edf0f..3014bc00ec 100644
--- a/src/fios_gui.cpp
+++ b/src/fios_gui.cpp
@@ -359,7 +359,7 @@ public:
 		/* pause is only used in single-player, non-editor mode, non-menu mode. It
 		 * will be unpaused in the WE_DESTROY event handler. */
 		if (_game_mode != GM_MENU && !_networking && _game_mode != GM_EDITOR) {
-			Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 1, {});
+			Command<CMD_PAUSE>::Post(PM_PAUSED_SAVELOAD, true);
 		}
 		SetObjectToPlace(SPR_CURSOR_ZZZ, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
 
@@ -403,7 +403,7 @@ public:
 	{
 		/* pause is only used in single-player, non-editor mode, non menu mode */
 		if (!_networking && _game_mode != GM_EDITOR && _game_mode != GM_MENU) {
-			Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 0, {});
+			Command<CMD_PAUSE>::Post(PM_PAUSED_SAVELOAD, false);
 		}
 		this->Window::Close();
 	}
diff --git a/src/highscore_gui.cpp b/src/highscore_gui.cpp
index bf09b1b949..0ccc288f05 100644
--- a/src/highscore_gui.cpp
+++ b/src/highscore_gui.cpp
@@ -97,7 +97,7 @@ struct EndGameWindow : EndGameHighScoreBaseWindow {
 	EndGameWindow(WindowDesc *desc) : EndGameHighScoreBaseWindow(desc)
 	{
 		/* Pause in single-player to have a look at the highscore at your own leisure */
-		if (!_networking) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
+		if (!_networking) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 
 		this->background_img = SPR_TYCOON_IMG1_BEGIN;
 
@@ -125,7 +125,7 @@ struct EndGameWindow : EndGameHighScoreBaseWindow {
 
 	void Close() override
 	{
-		if (!_networking) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {}); // unpause
+		if (!_networking) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, false); // unpause
 		ShowHighscoreTable(this->window_number, this->rank);
 		this->EndGameHighScoreBaseWindow::Close();
 	}
@@ -160,7 +160,7 @@ struct HighScoreWindow : EndGameHighScoreBaseWindow {
 	{
 		/* pause game to show the chart */
 		this->game_paused_by_player = _pause_mode == PM_PAUSED_NORMAL;
-		if (!_networking && !this->game_paused_by_player) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
+		if (!_networking && !this->game_paused_by_player) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 
 		/* Close all always on-top windows to get a clean screen */
 		if (_game_mode != GM_MENU) HideVitalWindows();
@@ -175,7 +175,7 @@ struct HighScoreWindow : EndGameHighScoreBaseWindow {
 	{
 		if (_game_mode != GM_MENU) ShowVitalWindows();
 
-		if (!_networking && !this->game_paused_by_player) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {}); // unpause
+		if (!_networking && !this->game_paused_by_player) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, false); // unpause
 
 		this->EndGameHighScoreBaseWindow::Close();
 	}
diff --git a/src/linkgraph/linkgraphschedule.cpp b/src/linkgraph/linkgraphschedule.cpp
index 0a6b891502..3581c72ac9 100644
--- a/src/linkgraph/linkgraphschedule.cpp
+++ b/src/linkgraph/linkgraphschedule.cpp
@@ -174,7 +174,7 @@ void StateGameLoop_LinkGraphPauseControl()
 	if (_pause_mode & PM_PAUSED_LINK_GRAPH) {
 		/* We are paused waiting on a job, check the job every tick. */
 		if (!LinkGraphSchedule::instance.IsJoinWithUnfinishedJobDue()) {
-			Command<CMD_PAUSE>::Post(0, PM_PAUSED_LINK_GRAPH, 0, {});
+			Command<CMD_PAUSE>::Post(PM_PAUSED_LINK_GRAPH, false);
 		}
 	} else if (_pause_mode == PM_UNPAUSED &&
 			_date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK - 2 &&
@@ -182,7 +182,7 @@ void StateGameLoop_LinkGraphPauseControl()
 			LinkGraphSchedule::instance.IsJoinWithUnfinishedJobDue()) {
 		/* Perform check two _date_fract ticks before we would join, to make
 		 * sure it also works in multiplayer. */
-		Command<CMD_PAUSE>::Post(0, PM_PAUSED_LINK_GRAPH, 1, {});
+		Command<CMD_PAUSE>::Post(PM_PAUSED_LINK_GRAPH, true);
 	}
 }
 
diff --git a/src/livery.h b/src/livery.h
index dc01c390a7..352cf6972e 100644
--- a/src/livery.h
+++ b/src/livery.h
@@ -17,7 +17,7 @@ static const byte LIT_COMPANY = 1; ///< Show the liveries of your own company
 static const byte LIT_ALL     = 2; ///< Show the liveries of all companies
 
 /** List of different livery schemes. */
-enum LiveryScheme {
+enum LiveryScheme : byte {
 	LS_BEGIN = 0,
 	LS_DEFAULT = 0,
 
diff --git a/src/main_gui.cpp b/src/main_gui.cpp
index 680493c12c..c25186164a 100644
--- a/src/main_gui.cpp
+++ b/src/main_gui.cpp
@@ -327,7 +327,7 @@ struct MainWindow : Window
 
 			case GHK_MONEY: // Gimme money
 				/* You can only cheat for money in singleplayer mode. */
-				if (!_networking) Command<CMD_MONEY_CHEAT>::Post(0, 10000000, 0, {});
+				if (!_networking) Command<CMD_MONEY_CHEAT>::Post(10000000);
 				break;
 
 			case GHK_UPDATE_COORDS: // Update the coordinates of all station signs
diff --git a/src/misc/endian_buffer.hpp b/src/misc/endian_buffer.hpp
index c20d9a8b99..87d527d9d8 100644
--- a/src/misc/endian_buffer.hpp
+++ b/src/misc/endian_buffer.hpp
@@ -14,6 +14,7 @@
 #include <string_view>
 #include "../core/span_type.hpp"
 #include "../core/bitmath_func.hpp"
+#include "../core/overflowsafe_type.hpp"
 
 struct StrongTypedefBase;
 
@@ -37,6 +38,9 @@ public:
 	EndianBufferWriter &operator <<(std::string_view data) { this->Write(data); return *this; }
 	EndianBufferWriter &operator <<(bool data) { return *this << static_cast<byte>(data ? 1 : 0); }
 
+	template <typename T>
+	EndianBufferWriter &operator <<(const OverflowSafeInt<T> &data) { return *this << static_cast<T>(data); };
+
 	template <typename... Targs>
 	EndianBufferWriter &operator <<(const std::tuple<Targs...> &data)
 	{
@@ -127,6 +131,9 @@ public:
 	EndianBufferReader &operator >>(std::string &data) { data = this->ReadStr(); return *this; }
 	EndianBufferReader &operator >>(bool &data) { data = this->Read<byte>() != 0; return *this; }
 
+	template <typename T>
+	EndianBufferReader &operator >>(OverflowSafeInt<T> &data) { data = this->Read<T>(); return *this; };
+
 	template <typename... Targs>
 	EndianBufferReader &operator >>(std::tuple<Targs...> &data)
 	{
diff --git a/src/misc_cmd.cpp b/src/misc_cmd.cpp
index 84c61e3f18..fd8f79476e 100644
--- a/src/misc_cmd.cpp
+++ b/src/misc_cmd.cpp
@@ -28,22 +28,16 @@
 
 #include "safeguards.h"
 
-/* Make sure we can discard lower 2 bits of 64bit amount when passing it to Cmd[In|De]creaseLoan() */
-static_assert((LOAN_INTERVAL & 3) == 0);
-
 /**
  * Increase the loan of your company.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 higher half of amount to increase the loan with, multitude of LOAN_INTERVAL. Only used when (p2 & 3) == 2.
- * @param p2 (bit 2-31) - lower half of amount (lower 2 bits assumed to be 0)
- *           (bit 0-1)  - when 0: loans LOAN_INTERVAL
- *                        when 1: loans the maximum loan permitting money (press CTRL),
- *                        when 2: loans the amount specified in p1 and p2
- * @param text unused
+ * @param cmd when LoanCommand::Interval: loans LOAN_INTERVAL,
+ *            when LoanCommand::Max: loans the maximum loan permitting money (press CTRL),
+ *            when LoanCommand::Amount: loans the amount specified in \c amount
+ * @param amount amount to increase the loan with, multitude of LOAN_INTERVAL. Only used when cmd == LoanCommand::Amount.
  * @return the cost of this operation or an error
  */
-CommandCost CmdIncreaseLoan(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdIncreaseLoan(DoCommandFlag flags, LoanCommand cmd, Money amount)
 {
 	Company *c = Company::Get(_current_company);
 
@@ -53,16 +47,16 @@ CommandCost CmdIncreaseLoan(DoCommandFlag flags, TileIndex tile, uint32 p1, uint
 	}
 
 	Money loan;
-	switch (p2 & 3) {
+	switch (cmd) {
 		default: return CMD_ERROR; // Invalid method
-		case 0: // Take some extra loan
+		case LoanCommand::Interval: // Take some extra loan
 			loan = LOAN_INTERVAL;
 			break;
-		case 1: // Take a loan as big as possible
+		case LoanCommand::Max: // Take a loan as big as possible
 			loan = _economy.max_loan - c->current_loan;
 			break;
-		case 2: // Take the given amount of loan
-			loan = ((uint64)p1 << 32) | (p2 & 0xFFFFFFFC);
+		case LoanCommand::Amount: // Take the given amount of loan
+			loan = amount;
 			if (loan < LOAN_INTERVAL || c->current_loan + loan > _economy.max_loan || loan % LOAN_INTERVAL != 0) return CMD_ERROR;
 			break;
 	}
@@ -82,33 +76,30 @@ CommandCost CmdIncreaseLoan(DoCommandFlag flags, TileIndex tile, uint32 p1, uint
 /**
  * Decrease the loan of your company.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 higher half of amount to decrease the loan with, multitude of LOAN_INTERVAL. Only used when (p2 & 3) == 2.
- * @param p2 (bit 2-31) - lower half of amount (lower 2 bits assumed to be 0)
- *           (bit 0-1)  - when 0: pays back LOAN_INTERVAL
- *                        when 1: pays back the maximum loan permitting money (press CTRL),
- *                        when 2: pays back the amount specified in p1 and p2
- * @param text unused
+ * @param cmd when LoanCommand::Interval: pays back LOAN_INTERVAL,
+ *            when LoanCommand::Max: pays back the maximum loan permitting money (press CTRL),
+ *            when LoanCommand::Amount: pays back the amount specified in \c amount
+ * @param amount amount to decrease the loan with, multitude of LOAN_INTERVAL. Only used when cmd == LoanCommand::Amount.
  * @return the cost of this operation or an error
  */
-CommandCost CmdDecreaseLoan(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdDecreaseLoan(DoCommandFlag flags, LoanCommand cmd, Money amount)
 {
 	Company *c = Company::Get(_current_company);
 
 	if (c->current_loan == 0) return_cmd_error(STR_ERROR_LOAN_ALREADY_REPAYED);
 
 	Money loan;
-	switch (p2 & 3) {
+	switch (cmd) {
 		default: return CMD_ERROR; // Invalid method
-		case 0: // Pay back one step
+		case LoanCommand::Interval: // Pay back one step
 			loan = std::min(c->current_loan, (Money)LOAN_INTERVAL);
 			break;
-		case 1: // Pay back as much as possible
+		case LoanCommand::Max: // Pay back as much as possible
 			loan = std::max(std::min(c->current_loan, c->money), (Money)LOAN_INTERVAL);
 			loan -= loan % LOAN_INTERVAL;
 			break;
-		case 2: // Repay the given amount of loan
-			loan = ((uint64)p1 << 32) | (p2 & 0xFFFFFFFC);
+		case LoanCommand::Amount: // Repay the given amount of loan
+			loan = amount;
 			if (loan % LOAN_INTERVAL != 0 || loan < LOAN_INTERVAL || loan > c->current_loan) return CMD_ERROR; // Invalid amount to loan
 			break;
 	}
@@ -135,7 +126,7 @@ CommandCost CmdDecreaseLoan(DoCommandFlag flags, TileIndex tile, uint32 p1, uint
 static void AskUnsafeUnpauseCallback(Window *w, bool confirmed)
 {
 	if (confirmed) {
-		Command<CMD_PAUSE>::Post(0, PM_PAUSED_ERROR, 0, {});
+		Command<CMD_PAUSE>::Post(PM_PAUSED_ERROR, false);
 	}
 }
 
@@ -145,15 +136,13 @@ static void AskUnsafeUnpauseCallback(Window *w, bool confirmed)
  * unpaused. A bitset is used instead of a boolean value/counter to have
  * more control over the game when saving/loading, etc.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 the pause mode to change
- * @param p2 1 pauses, 0 unpauses this mode
- * @param text unused
+ * @param mode the pause mode to change
+ * @param pause true pauses, false unpauses this mode
  * @return the cost of this operation or an error
  */
-CommandCost CmdPause(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdPause(DoCommandFlag flags, PauseMode mode, bool pause)
 {
-	switch (p1) {
+	switch (mode) {
 		case PM_PAUSED_SAVELOAD:
 		case PM_PAUSED_ERROR:
 		case PM_PAUSED_NORMAL:
@@ -169,7 +158,7 @@ CommandCost CmdPause(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2,
 		default: return CMD_ERROR;
 	}
 	if (flags & DC_EXEC) {
-		if (p1 == PM_PAUSED_NORMAL && _pause_mode & PM_PAUSED_ERROR) {
+		if (mode == PM_PAUSED_NORMAL && _pause_mode & PM_PAUSED_ERROR) {
 			ShowQuery(
 				STR_NEWGRF_UNPAUSE_WARNING_TITLE,
 				STR_NEWGRF_UNPAUSE_WARNING,
@@ -179,13 +168,13 @@ CommandCost CmdPause(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2,
 		} else {
 			PauseMode prev_mode = _pause_mode;
 
-			if (p2 == 0) {
-				_pause_mode = static_cast<PauseMode>(_pause_mode & (byte)~p1);
+			if (pause) {
+				_pause_mode |= mode;
 			} else {
-				_pause_mode = static_cast<PauseMode>(_pause_mode | (byte)p1);
+				_pause_mode &= ~mode;
 			}
 
-			NetworkHandlePauseChange(prev_mode, (PauseMode)p1);
+			NetworkHandlePauseChange(prev_mode, mode);
 		}
 
 		SetWindowDirty(WC_STATUS_BAR, 0);
@@ -197,33 +186,25 @@ CommandCost CmdPause(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2,
 /**
  * Change the financial flow of your company.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 the amount of money to receive (if positive), or spend (if negative)
- * @param p2 unused
- * @param text unused
+ * @param amount the amount of money to receive (if positive), or spend (if negative)
  * @return the cost of this operation or an error
  */
-CommandCost CmdMoneyCheat(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdMoneyCheat(DoCommandFlag flags, Money amount)
 {
-	return CommandCost(EXPENSES_OTHER, -(int32)p1);
+	return CommandCost(EXPENSES_OTHER, -amount);
 }
 
 /**
  * Change the bank bank balance of a company by inserting or removing money without affecting the loan.
  * @param flags operation to perform
  * @param tile tile to show text effect on (if not 0)
- * @param p1 the amount of money to receive (if positive), or spend (if negative)
- * @param p2 (bit 0-7)  - the company ID.
- *           (bit 8-15) - the expenses type which should register the cost/income @see ExpensesType.
- * @param text unused
+ * @param delta the amount of money to receive (if positive), or spend (if negative)
+ * @param company the company ID.
+ * @param expenses_type the expenses type which should register the cost/income @see ExpensesType.
  * @return zero cost or an error
  */
-CommandCost CmdChangeBankBalance(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdChangeBankBalance(DoCommandFlag flags, TileIndex tile, Money delta, CompanyID company, ExpensesType expenses_type)
 {
-	int32 delta = (int32)p1;
-	CompanyID company = (CompanyID) GB(p2, 0, 8);
-	ExpensesType expenses_type = Extract<ExpensesType, 8, 8>(p2);
-
 	if (!Company::IsValidID(company)) return CMD_ERROR;
 	if (expenses_type >= EXPENSES_END) return CMD_ERROR;
 	if (_current_company != OWNER_DEITY) return CMD_ERROR;
diff --git a/src/misc_cmd.h b/src/misc_cmd.h
index 6827db3ac2..77250b551c 100644
--- a/src/misc_cmd.h
+++ b/src/misc_cmd.h
@@ -11,12 +11,21 @@
 #define MISC_CMD_H
 
 #include "command_type.h"
+#include "economy_type.h"
 
-CommandProc CmdMoneyCheat;
-CommandProc CmdChangeBankBalance;
-CommandProc CmdIncreaseLoan;
-CommandProc CmdDecreaseLoan;
-CommandProc CmdPause;
+enum PauseMode : byte;
+
+enum class LoanCommand : byte {
+	Interval,
+	Max,
+	Amount,
+};
+
+CommandCost CmdMoneyCheat(DoCommandFlag flags, Money amount);
+CommandCost CmdChangeBankBalance(DoCommandFlag flags, TileIndex tile, Money delta, CompanyID company, ExpensesType expenses_type);
+CommandCost CmdIncreaseLoan(DoCommandFlag flags, LoanCommand cmd, Money amount);
+CommandCost CmdDecreaseLoan(DoCommandFlag flags, LoanCommand cmd, Money amount);
+CommandCost CmdPause(DoCommandFlag flags, PauseMode mode, bool pause);
 
 DEF_CMD_TRAIT(CMD_MONEY_CHEAT,         CmdMoneyCheat,        CMD_OFFLINE,             CMDT_CHEAT)
 DEF_CMD_TRAIT(CMD_CHANGE_BANK_BALANCE, CmdChangeBankBalance, CMD_DEITY,               CMDT_MONEY_MANAGEMENT)
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 3bd287f85a..19cb6ab3a4 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -395,7 +395,7 @@ static void CheckPauseHelper(bool pause, PauseMode pm)
 {
 	if (pause == ((_pause_mode & pm) != PM_UNPAUSED)) return;
 
-	Command<CMD_PAUSE>::Post(0, pm, pause ? 1 : 0, {});
+	Command<CMD_PAUSE>::Post(pm, pause);
 }
 
 /**
@@ -1128,7 +1128,7 @@ void NetworkGameLoop()
 				cp = new CommandPacket();
 				cp->company = COMPANY_SPECTATOR;
 				cp->cmd = CMD_PAUSE;
-				cp->data = EndianBufferWriter<>::FromValue(CommandTraits<CMD_PAUSE>::Args{ 0, PM_PAUSED_NORMAL, 1, "" });
+				cp->data = EndianBufferWriter<>::FromValue(CommandTraits<CMD_PAUSE>::Args{ PM_PAUSED_NORMAL, true });
 				_ddc_fastforward = false;
 			} else if (strncmp(p, "sync: ", 6) == 0) {
 				int ret = sscanf(p + 6, "%x; %x; %x; %x", &next_date, &next_date_fract, &sync_state[0], &sync_state[1]);
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp
index 197d398bf6..36ab3840a4 100644
--- a/src/network/network_server.cpp
+++ b/src/network/network_server.cpp
@@ -2081,7 +2081,7 @@ void NetworkServerNewCompany(const Company *c, NetworkClientInfo *ci)
 		/* ci is nullptr when replaying, or for AIs. In neither case there is a client. */
 		ci->client_playas = c->index;
 		NetworkUpdateClientInfo(ci->client_id);
-		Command<CMD_RENAME_PRESIDENT>::SendNet(STR_NULL, nullptr, c->index, 0, 0, 0, ci->client_name);
+		Command<CMD_RENAME_PRESIDENT>::SendNet(STR_NULL, nullptr, c->index, ci->client_name);
 	}
 
 	/* Announce new company on network. */
diff --git a/src/news_cmd.h b/src/news_cmd.h
index 4a75037b3b..6ebb1b84d9 100644
--- a/src/news_cmd.h
+++ b/src/news_cmd.h
@@ -11,8 +11,10 @@
 #define NEWS_CMD_H
 
 #include "command_type.h"
+#include "company_type.h"
+#include "news_type.h"
 
-CommandProc CmdCustomNewsItem;
+CommandCost CmdCustomNewsItem(DoCommandFlag flags, NewsType type, NewsReferenceType reftype1, CompanyID company, uint32 reference, const std::string &text);
 
 DEF_CMD_TRAIT(CMD_CUSTOM_NEWS_ITEM, CmdCustomNewsItem, CMD_STR_CTRL | CMD_DEITY, CMDT_OTHER_MANAGEMENT)
 
diff --git a/src/news_gui.cpp b/src/news_gui.cpp
index 69ab19b3b4..ee0e17fac0 100644
--- a/src/news_gui.cpp
+++ b/src/news_gui.cpp
@@ -837,23 +837,17 @@ void AddNewsItem(StringID string, NewsType type, NewsFlag flags, NewsReferenceTy
 /**
  * Create a new custom news item.
  * @param flags type of operation
- * @param tile unused
- * @param p1 various bitstuffed elements
- * - p1 = (bit  0 -  7) - NewsType of the message.
- * - p1 = (bit  8 - 15) - NewsReferenceType of first reference.
- * - p1 = (bit 16 - 23) - Company this news message is for.
- * @param p2 First reference of the news message.
+ * @aram type NewsType of the message.
+ * @param reftype1 NewsReferenceType of first reference.
+ * @param company Company this news message is for.
+ * @param reference First reference of the news message.
  * @param text The text of the news message.
  * @return the cost of this operation or an error
  */
-CommandCost CmdCustomNewsItem(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdCustomNewsItem(DoCommandFlag flags, NewsType type, NewsReferenceType reftype1, CompanyID company, uint32 reference, const std::string &text)
 {
 	if (_current_company != OWNER_DEITY) return CMD_ERROR;
 
-	NewsType type = (NewsType)GB(p1, 0, 8);
-	NewsReferenceType reftype1 = (NewsReferenceType)GB(p1, 8, 8);
-	CompanyID company = (CompanyID)GB(p1, 16, 8);
-
 	if (company != INVALID_OWNER && !Company::IsValidID(company)) return CMD_ERROR;
 	if (type >= NT_END) return CMD_ERROR;
 	if (text.empty()) return CMD_ERROR;
@@ -861,27 +855,27 @@ CommandCost CmdCustomNewsItem(DoCommandFlag flags, TileIndex tile, uint32 p1, ui
 	switch (reftype1) {
 		case NR_NONE: break;
 		case NR_TILE:
-			if (!IsValidTile(p2)) return CMD_ERROR;
+			if (!IsValidTile(reference)) return CMD_ERROR;
 			break;
 
 		case NR_VEHICLE:
-			if (!Vehicle::IsValidID(p2)) return CMD_ERROR;
+			if (!Vehicle::IsValidID(reference)) return CMD_ERROR;
 			break;
 
 		case NR_STATION:
-			if (!Station::IsValidID(p2)) return CMD_ERROR;
+			if (!Station::IsValidID(reference)) return CMD_ERROR;
 			break;
 
 		case NR_INDUSTRY:
-			if (!Industry::IsValidID(p2)) return CMD_ERROR;
+			if (!Industry::IsValidID(reference)) return CMD_ERROR;
 			break;
 
 		case NR_TOWN:
-			if (!Town::IsValidID(p2)) return CMD_ERROR;
+			if (!Town::IsValidID(reference)) return CMD_ERROR;
 			break;
 
 		case NR_ENGINE:
-			if (!Engine::IsValidID(p2)) return CMD_ERROR;
+			if (!Engine::IsValidID(reference)) return CMD_ERROR;
 			break;
 
 		default: return CMD_ERROR;
@@ -892,7 +886,7 @@ CommandCost CmdCustomNewsItem(DoCommandFlag flags, TileIndex tile, uint32 p1, ui
 	if (flags & DC_EXEC) {
 		NewsStringData *news = new NewsStringData(text);
 		SetDParamStr(0, news->string);
-		AddNewsItem(STR_NEWS_CUSTOM_ITEM, type, NF_NORMAL, reftype1, p2, NR_NONE, UINT32_MAX, news);
+		AddNewsItem(STR_NEWS_CUSTOM_ITEM, type, NF_NORMAL, reftype1, reference, NR_NONE, UINT32_MAX, news);
 	}
 
 	return CommandCost();
diff --git a/src/news_type.h b/src/news_type.h
index 188305b52f..7d9f6b7720 100644
--- a/src/news_type.h
+++ b/src/news_type.h
@@ -18,7 +18,7 @@
 /**
  * Type of news.
  */
-enum NewsType {
+enum NewsType : byte {
 	NT_ARRIVAL_COMPANY, ///< First vehicle arrived for company
 	NT_ARRIVAL_OTHER,   ///< First vehicle arrived for competitor
 	NT_ACCIDENT,        ///< An accident or disaster has occurred
@@ -47,7 +47,7 @@ enum NewsType {
  * You have to make sure, #ChangeVehicleNews catches the DParams of your message.
  * This is NOT ensured by the references.
  */
-enum NewsReferenceType {
+enum NewsReferenceType : byte {
 	NR_NONE,      ///< Empty reference
 	NR_TILE,      ///< Reference tile.     Scroll to tile when clicking on the news.
 	NR_VEHICLE,   ///< Reference vehicle.  Scroll to vehicle when clicking on the news. Delete news when vehicle is deleted.
diff --git a/src/openttd.cpp b/src/openttd.cpp
index c5c849e71c..230529a786 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -852,7 +852,7 @@ static void MakeNewGameDone()
 	/* In a dedicated server, the server does not play */
 	if (!VideoDriver::GetInstance()->HasGUI()) {
 		OnStartGame(true);
-		if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
+		if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 		return;
 	}
 
@@ -881,7 +881,7 @@ static void MakeNewGameDone()
 		NetworkChangeCompanyPassword(_local_company, _settings_client.network.default_company_pass);
 	}
 
-	if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
+	if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 
 	CheckEngines();
 	CheckIndustries();
@@ -1046,7 +1046,7 @@ void SwitchToMode(SwitchMode new_mode)
 				}
 				OnStartGame(_network_dedicated);
 				/* Decrease pause counter (was increased from opening load dialog) */
-				Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 0, {});
+				Command<CMD_PAUSE>::Post(PM_PAUSED_SAVELOAD, false);
 			}
 			break;
 		}
@@ -1068,7 +1068,7 @@ void SwitchToMode(SwitchMode new_mode)
 				SetLocalCompany(OWNER_NONE);
 				_settings_newgame.game_creation.starting_year = _cur_year;
 				/* Cancel the saveload pausing */
-				Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 0, {});
+				Command<CMD_PAUSE>::Post(PM_PAUSED_SAVELOAD, false);
 			} else {
 				SetDParamStr(0, GetSaveLoadErrorString());
 				ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
diff --git a/src/script/api/script_company.cpp b/src/script/api/script_company.cpp
index 1cc69bc93f..6a06852da5 100644
--- a/src/script/api/script_company.cpp
+++ b/src/script/api/script_company.cpp
@@ -52,7 +52,7 @@
 	EnforcePreconditionEncodedText(false, text);
 	EnforcePreconditionCustomError(false, ::Utf8StringLength(text) < MAX_LENGTH_COMPANY_NAME_CHARS, ScriptError::ERR_PRECONDITION_STRING_TOO_LONG);
 
-	return ScriptObject::Command<CMD_RENAME_COMPANY>::Do(0, 0, 0, text);
+	return ScriptObject::Command<CMD_RENAME_COMPANY>::Do(text);
 }
 
 /* static */ char *ScriptCompany::GetName(ScriptCompany::CompanyID company)
@@ -73,7 +73,7 @@
 	EnforcePreconditionEncodedText(false, text);
 	EnforcePreconditionCustomError(false, ::Utf8StringLength(text) < MAX_LENGTH_PRESIDENT_NAME_CHARS, ScriptError::ERR_PRECONDITION_STRING_TOO_LONG);
 
-	return ScriptObject::Command<CMD_RENAME_PRESIDENT>::Do(0, 0, 0, text);
+	return ScriptObject::Command<CMD_RENAME_PRESIDENT>::Do(text);
 }
 
 /* static */ char *ScriptCompany::GetPresidentName(ScriptCompany::CompanyID company)
@@ -101,7 +101,7 @@
 	GenderEthnicity ge = (GenderEthnicity)((gender == GENDER_FEMALE ? (1 << ::GENDER_FEMALE) : 0) | (::InteractiveRandom() & (1 << ETHNICITY_BLACK)));
 	RandomCompanyManagerFaceBits(cmf, ge, false);
 
-	return ScriptObject::Command<CMD_SET_COMPANY_MANAGER_FACE>::Do(0, 0, cmf, {});
+	return ScriptObject::Command<CMD_SET_COMPANY_MANAGER_FACE>::Do(cmf);
 }
 
 /* static */ ScriptCompany::Gender ScriptCompany::GetPresidentGender(CompanyID company)
@@ -211,9 +211,9 @@
 	Money amount = abs(loan - GetLoanAmount());
 
 	if (loan > GetLoanAmount()) {
-		return ScriptObject::Command<CMD_INCREASE_LOAN>::Do(0, amount >> 32, (amount & 0xFFFFFFFC) | 2, {});
+		return ScriptObject::Command<CMD_INCREASE_LOAN>::Do(LoanCommand::Amount, amount);
 	} else {
-		return ScriptObject::Command<CMD_DECREASE_LOAN>::Do(0, amount >> 32, (amount & 0xFFFFFFFC) | 2, {});
+		return ScriptObject::Command<CMD_DECREASE_LOAN>::Do(LoanCommand::Amount, amount);
 	}
 }
 
@@ -244,7 +244,7 @@
 	EnforcePrecondition(false, company != COMPANY_INVALID);
 
 	/* Network commands only allow 0 to indicate invalid tiles, not INVALID_TILE */
-	return ScriptObject::Command<CMD_CHANGE_BANK_BALANCE>::Do(tile == INVALID_TILE ? (TileIndex)0U : tile, (uint32)(delta), company | expenses_type << 8, {});
+	return ScriptObject::Command<CMD_CHANGE_BANK_BALANCE>::Do(tile == INVALID_TILE ? (TileIndex)0U : tile, delta, (::CompanyID)company, (::ExpensesType)expenses_type);
 }
 
 /* static */ bool ScriptCompany::BuildCompanyHQ(TileIndex tile)
@@ -266,7 +266,7 @@
 
 /* static */ bool ScriptCompany::SetAutoRenewStatus(bool autorenew)
 {
-	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do(0, 0, autorenew ? 1 : 0, "company.engine_renew");
+	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do("company.engine_renew", autorenew ? 1 : 0);
 }
 
 /* static */ bool ScriptCompany::GetAutoRenewStatus(CompanyID company)
@@ -279,7 +279,7 @@
 
 /* static */ bool ScriptCompany::SetAutoRenewMonths(int16 months)
 {
-	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do(0, 0, months, "company.engine_renew_months");
+	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do("company.engine_renew_months", months);
 }
 
 /* static */ int16 ScriptCompany::GetAutoRenewMonths(CompanyID company)
@@ -294,7 +294,7 @@
 {
 	EnforcePrecondition(false, money >= 0);
 	EnforcePrecondition(false, (int64)money <= UINT32_MAX);
-	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do(0, 0, money, "company.engine_renew_money");
+	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do("company.engine_renew_money", money);
 }
 
 /* static */ Money ScriptCompany::GetAutoRenewMoney(CompanyID company)
@@ -307,12 +307,12 @@
 
 /* static */ bool ScriptCompany::SetPrimaryLiveryColour(LiveryScheme scheme, Colours colour)
 {
-	return ScriptObject::Command<CMD_SET_COMPANY_COLOUR>::Do(0, scheme, colour, {});
+	return ScriptObject::Command<CMD_SET_COMPANY_COLOUR>::Do((::LiveryScheme)scheme, true, (::Colours)colour);
 }
 
 /* static */ bool ScriptCompany::SetSecondaryLiveryColour(LiveryScheme scheme, Colours colour)
 {
-	return ScriptObject::Command<CMD_SET_COMPANY_COLOUR>::Do(0, scheme | 1 << 8, colour, {});
+	return ScriptObject::Command<CMD_SET_COMPANY_COLOUR>::Do((::LiveryScheme)scheme, false, (::Colours)colour);
 }
 
 /* static */ ScriptCompany::Colours ScriptCompany::GetPrimaryLiveryColour(ScriptCompany::LiveryScheme scheme)
diff --git a/src/script/api/script_controller.cpp b/src/script/api/script_controller.cpp
index 74a3ad3ea8..232ce5a3b6 100644
--- a/src/script/api/script_controller.cpp
+++ b/src/script/api/script_controller.cpp
@@ -60,7 +60,7 @@
 	ShowAIDebugWindow(ScriptObject::GetRootCompany());
 
 	if ((_pause_mode & PM_PAUSED_NORMAL) == PM_UNPAUSED) {
-		ScriptObject::Command<CMD_PAUSE>::Do(0, PM_PAUSED_NORMAL, 1, {});
+		ScriptObject::Command<CMD_PAUSE>::Do(PM_PAUSED_NORMAL, true);
 	}
 }
 
diff --git a/src/script/api/script_event_types.cpp b/src/script/api/script_event_types.cpp
index e876febc28..e9349a035f 100644
--- a/src/script/api/script_event_types.cpp
+++ b/src/script/api/script_event_types.cpp
@@ -117,7 +117,7 @@ bool ScriptEventEnginePreview::AcceptPreview()
 
 bool ScriptEventCompanyAskMerger::AcceptMerger()
 {
-	return ScriptObject::Command<CMD_BUY_COMPANY>::Do(0, this->owner, 0, {});
+	return ScriptObject::Command<CMD_BUY_COMPANY>::Do((::CompanyID)this->owner);
 }
 
 ScriptEventAdminPort::ScriptEventAdminPort(const std::string &json) :
diff --git a/src/script/api/script_game.cpp b/src/script/api/script_game.cpp
index 9b40a1cd3b..3df6aef154 100644
--- a/src/script/api/script_game.cpp
+++ b/src/script/api/script_game.cpp
@@ -18,12 +18,12 @@
 
 /* static */ bool ScriptGame::Pause()
 {
-	return ScriptObject::Command<CMD_PAUSE>::Do(0, PM_PAUSED_GAME_SCRIPT, 1, {});
+	return ScriptObject::Command<CMD_PAUSE>::Do(PM_PAUSED_GAME_SCRIPT, true);
 }
 
 /* static */ bool ScriptGame::Unpause()
 {
-	return ScriptObject::Command<CMD_PAUSE>::Do(0, PM_PAUSED_GAME_SCRIPT, 0, {});
+	return ScriptObject::Command<CMD_PAUSE>::Do(PM_PAUSED_GAME_SCRIPT, false);
 }
 
 /* static */ bool ScriptGame::IsPaused()
diff --git a/src/script/api/script_gamesettings.cpp b/src/script/api/script_gamesettings.cpp
index 611b78b8b6..2791aba006 100644
--- a/src/script/api/script_gamesettings.cpp
+++ b/src/script/api/script_gamesettings.cpp
@@ -38,7 +38,7 @@
 
 	if ((sd->flags & SF_NO_NETWORK_SYNC) != 0) return false;
 
-	return ScriptObject::Command<CMD_CHANGE_SETTING>::Do(0, 0, value, sd->GetName());
+	return ScriptObject::Command<CMD_CHANGE_SETTING>::Do(sd->GetName(), value);
 }
 
 /* static */ bool ScriptGameSettings::IsDisabledVehicleType(ScriptVehicle::VehicleType vehicle_type)
diff --git a/src/script/api/script_group.cpp b/src/script/api/script_group.cpp
index 5047dc5c0e..dbf4c0280e 100644
--- a/src/script/api/script_group.cpp
+++ b/src/script/api/script_group.cpp
@@ -130,7 +130,7 @@
 {
 	if (HasWagonRemoval() == enable_removal) return true;
 
-	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do(0, 0, enable_removal ? 1 : 0, "company.renew_keep_length");
+	return ScriptObject::Command<CMD_CHANGE_COMPANY_SETTING>::Do("company.renew_keep_length", enable_removal ? 1 : 0);
 }
 
 /* static */ bool ScriptGroup::HasWagonRemoval()
diff --git a/src/script/api/script_news.cpp b/src/script/api/script_news.cpp
index 7f46f5aa6c..119cbc735c 100644
--- a/src/script/api/script_news.cpp
+++ b/src/script/api/script_news.cpp
@@ -39,5 +39,5 @@
 	if (company == ScriptCompany::COMPANY_INVALID) c = INVALID_COMPANY;
 
 	if (ref_type == NR_NONE) reference = 0;
-	return ScriptObject::Command<CMD_CUSTOM_NEWS_ITEM>::Do(0, type | (ref_type << 8) | (c << 16), reference, encoded);
+	return ScriptObject::Command<CMD_CUSTOM_NEWS_ITEM>::Do((::NewsType)type, (::NewsReferenceType)ref_type, (::CompanyID)c, reference, encoded);
 }
diff --git a/src/script/api/script_subsidy.cpp b/src/script/api/script_subsidy.cpp
index 32962d1581..5e1180d1bb 100644
--- a/src/script/api/script_subsidy.cpp
+++ b/src/script/api/script_subsidy.cpp
@@ -39,7 +39,7 @@
 	EnforcePrecondition(false, (from_type == SPT_INDUSTRY && ScriptIndustry::IsValidIndustry(from_id)) || (from_type == SPT_TOWN && ScriptTown::IsValidTown(from_id)));
 	EnforcePrecondition(false, (to_type == SPT_INDUSTRY && ScriptIndustry::IsValidIndustry(to_id)) || (to_type == SPT_TOWN && ScriptTown::IsValidTown(to_id)));
 
-	return ScriptObject::Command<CMD_CREATE_SUBSIDY>::Do(0, from_type | (from_id << 8) | (cargo_type << 24), to_type | (to_id << 8), {});
+	return ScriptObject::Command<CMD_CREATE_SUBSIDY>::Do(cargo_type, (::SourceType)from_type, from_id, (::SourceType)to_type, to_id);
 }
 
 /* static */ ScriptCompany::CompanyID ScriptSubsidy::GetAwardedTo(SubsidyID subsidy_id)
diff --git a/src/settings.cpp b/src/settings.cpp
index 3c0f92f39b..25eeb964a5 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1487,18 +1487,16 @@ const SettingDesc *GetSettingFromName(const std::string_view name)
 /**
  * Network-safe changing of settings (server-only).
  * @param flags operation to perform
- * @param tile unused
- * @param p1 unused
- * @param p2 the new value for the setting
+ * @param name the name of the setting to change
+ * @param value the new value for the setting
  * The new value is properly clamped to its minimum/maximum when setting
- * @param text the name of the setting to change
  * @return the cost of this operation or an error
  * @see _settings
  */
-CommandCost CmdChangeSetting(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdChangeSetting(DoCommandFlag flags, const std::string &name, int32 value)
 {
-	if (text.empty()) return CMD_ERROR;
-	const SettingDesc *sd = GetSettingFromName(text);
+	if (name.empty()) return CMD_ERROR;
+	const SettingDesc *sd = GetSettingFromName(name);
 
 	if (sd == nullptr) return CMD_ERROR;
 	if (!SlIsObjectCurrentlyValid(sd->save.version_from, sd->save.version_to)) return CMD_ERROR;
@@ -1507,7 +1505,7 @@ CommandCost CmdChangeSetting(DoCommandFlag flags, TileIndex tile, uint32 p1, uin
 	if (!sd->IsEditable(true)) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
-		sd->AsIntSetting()->ChangeValue(&GetGameSettings(), p2);
+		sd->AsIntSetting()->ChangeValue(&GetGameSettings(), value);
 	}
 
 	return CommandCost();
@@ -1516,23 +1514,21 @@ CommandCost CmdChangeSetting(DoCommandFlag flags, TileIndex tile, uint32 p1, uin
 /**
  * Change one of the per-company settings.
  * @param flags operation to perform
- * @param tile unused
- * @param p1 unused
- * @param p2 the new value for the setting
+ * @param name the name of the company setting to change
+ * @param value the new value for the setting
  * The new value is properly clamped to its minimum/maximum when setting
- * @param text the name of the company setting to change
  * @return the cost of this operation or an error
  */
-CommandCost CmdChangeCompanySetting(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdChangeCompanySetting(DoCommandFlag flags, const std::string &name, int32 value)
 {
-	if (text.empty()) return CMD_ERROR;
-	const SettingDesc *sd = GetCompanySettingFromName(text.c_str());
+	if (name.empty()) return CMD_ERROR;
+	const SettingDesc *sd = GetCompanySettingFromName(name);
 
 	if (sd == nullptr) return CMD_ERROR;
 	if (!sd->IsIntSetting()) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
-		sd->AsIntSetting()->ChangeValue(&Company::Get(_current_company)->settings, p2);
+		sd->AsIntSetting()->ChangeValue(&Company::Get(_current_company)->settings, value);
 	}
 
 	return CommandCost();
@@ -1550,7 +1546,7 @@ bool SetSettingValue(const IntSettingDesc *sd, int32 value, bool force_newgame)
 	const IntSettingDesc *setting = sd->AsIntSetting();
 	if ((setting->flags & SF_PER_COMPANY) != 0) {
 		if (Company::IsValidID(_local_company) && _game_mode != GM_MENU) {
-			return Command<CMD_CHANGE_COMPANY_SETTING>::Post(0, 0, value, setting->GetName());
+			return Command<CMD_CHANGE_COMPANY_SETTING>::Post(setting->GetName(), value);
 		}
 
 		setting->ChangeValue(&_settings_client.company, value);
@@ -1576,7 +1572,7 @@ bool SetSettingValue(const IntSettingDesc *sd, int32 value, bool force_newgame)
 
 	/* send non-company-based settings over the network */
 	if (!_networking || (_networking && _network_server)) {
-		return Command<CMD_CHANGE_SETTING>::Post(0, 0, value, setting->GetName());
+		return Command<CMD_CHANGE_SETTING>::Post(setting->GetName(), value);
 	}
 	return false;
 }
@@ -1604,7 +1600,7 @@ void SyncCompanySettings()
 		const SettingDesc *sd = GetSettingDesc(desc);
 		uint32 old_value = (uint32)sd->AsIntSetting()->Read(new_object);
 		uint32 new_value = (uint32)sd->AsIntSetting()->Read(old_object);
-		if (old_value != new_value) Command<CMD_CHANGE_COMPANY_SETTING>::SendNet(STR_NULL, nullptr, _local_company, 0, 0, new_value, sd->GetName());
+		if (old_value != new_value) Command<CMD_CHANGE_COMPANY_SETTING>::SendNet(STR_NULL, nullptr, _local_company, sd->GetName(), new_value);
 	}
 }
 
diff --git a/src/settings_cmd.h b/src/settings_cmd.h
index 15b9c31a48..d41f229e1b 100644
--- a/src/settings_cmd.h
+++ b/src/settings_cmd.h
@@ -12,8 +12,8 @@
 
 #include "command_type.h"
 
-CommandProc CmdChangeSetting;
-CommandProc CmdChangeCompanySetting;
+CommandCost CmdChangeSetting(DoCommandFlag flags, const std::string &name, int32 value);
+CommandCost CmdChangeCompanySetting(DoCommandFlag flags, const std::string &name, int32 value);
 
 DEF_CMD_TRAIT(CMD_CHANGE_SETTING,         CmdChangeSetting,        CMD_SERVER, CMDT_SERVER_SETTING)
 DEF_CMD_TRAIT(CMD_CHANGE_COMPANY_SETTING, CmdChangeCompanySetting, 0,          CMDT_COMPANY_SETTING)
diff --git a/src/subsidy.cpp b/src/subsidy.cpp
index 992c7a6726..0c32dbcf12 100644
--- a/src/subsidy.cpp
+++ b/src/subsidy.cpp
@@ -232,27 +232,17 @@ void CreateSubsidy(CargoID cid, SourceType src_type, SourceID src, SourceType ds
 /**
  * Create a new subsidy.
  * @param flags type of operation
- * @param tile unused.
- * @param p1 various bitstuffed elements
- * - p1 = (bit  0 -  7) - SourceType of source.
- * - p1 = (bit  8 - 23) - SourceID of source.
- * - p1 = (bit 24 - 31) - CargoID of subsidy.
- * @param p2 various bitstuffed elements
- * - p2 = (bit  0 -  7) - SourceType of destination.
- * - p2 = (bit  8 - 23) - SourceID of destination.
- * @param text unused.
+ * @param cid CargoID of subsidy.
+ * @param src_type SourceType of source.
+ * @param src SourceID of source.
+ * @param dst_type SourceType of destination.
+ * @param dst SourceID of destination.
  * @return the cost of this operation or an error
  */
-CommandCost CmdCreateSubsidy(DoCommandFlag flags, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+CommandCost CmdCreateSubsidy(DoCommandFlag flags, CargoID cid, SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
 {
 	if (!Subsidy::CanAllocateItem()) return CMD_ERROR;
 
-	CargoID cid = GB(p1, 24, 8);
-	SourceType src_type = (SourceType)GB(p1, 0, 8);
-	SourceID src = GB(p1, 8, 16);
-	SourceType dst_type = (SourceType)GB(p2, 0, 8);
-	SourceID dst = GB(p2, 8, 16);
-
 	if (_current_company != OWNER_DEITY) return CMD_ERROR;
 
 	if (cid >= NUM_CARGO || !::CargoSpec::Get(cid)->IsValid()) return CMD_ERROR;
diff --git a/src/subsidy_cmd.h b/src/subsidy_cmd.h
index f68c9b3034..d018688dad 100644
--- a/src/subsidy_cmd.h
+++ b/src/subsidy_cmd.h
@@ -11,8 +11,9 @@
 #define SUBSIDY_CMD_H
 
 #include "command_type.h"
+#include "cargo_type.h"
 
-CommandProc CmdCreateSubsidy;
+CommandCost CmdCreateSubsidy(DoCommandFlag flags, CargoID cid, SourceType src_type, SourceID src, SourceType dst_type, SourceID dst);
 
 DEF_CMD_TRAIT(CMD_CREATE_SUBSIDY, CmdCreateSubsidy, CMD_DEITY, CMDT_OTHER_MANAGEMENT)
 
diff --git a/src/toolbar_gui.cpp b/src/toolbar_gui.cpp
index b2b25afa6c..13c52f2b4e 100644
--- a/src/toolbar_gui.cpp
+++ b/src/toolbar_gui.cpp
@@ -266,7 +266,7 @@ static CallBackFunction ToolbarPauseClick(Window *w)
 {
 	if (_networking && !_network_server) return CBF_NONE; // only server can pause the game
 
-	if (Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, _pause_mode == PM_UNPAUSED, {})) {
+	if (Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, _pause_mode == PM_UNPAUSED)) {
 		if (_settings_client.sound.confirm) SndPlayFx(SND_15_BEEP);
 	}
 	return CBF_NONE;
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index 8bfc332f65..6bb8d0986a 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -88,7 +88,7 @@ void CheckTrainsLengths()
 
 						if (!_networking && first) {
 							first = false;
-							Command<CMD_PAUSE>::Post(0, PM_PAUSED_ERROR, 1, {});
+							Command<CMD_PAUSE>::Post(PM_PAUSED_ERROR, true);
 						}
 						/* Break so we warn only once for each train. */
 						break;
diff --git a/src/vehicle.cpp b/src/vehicle.cpp
index d5d39b6e8d..3bbca46f0e 100644
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -311,7 +311,7 @@ void ShowNewGrfVehicleError(EngineID engine, StringID part1, StringID part2, GRF
 		SetDParamStr(0, grfconfig->GetName());
 		SetDParam(1, engine);
 		ShowErrorMessage(part1, part2, WL_CRITICAL);
-		if (!_networking) Command<CMD_PAUSE>::Do(DC_EXEC, 0, critical ? PM_PAUSED_ERROR : PM_PAUSED_NORMAL, 1, {});
+		if (!_networking) Command<CMD_PAUSE>::Do(DC_EXEC, critical ? PM_PAUSED_ERROR : PM_PAUSED_NORMAL, true);
 	}
 
 	/* debug output */