Index: Lua/LuaRules.cpp
===================================================================
--- Lua/LuaRules.cpp	(revision 3598)
+++ Lua/LuaRules.cpp	(working copy)
@@ -92,6 +92,7 @@
 	haveAllowUnitCreation    = HasCallIn("AllowUnitCreation");
 	haveAllowUnitTransfer    = HasCallIn("AllowUnitTransfer");
 	haveAllowFeatureCreation = HasCallIn("AllowFeatureCreation");
+	haveCommandFallback      = HasCallIn("CommandFallback");
 }
 
 
@@ -322,6 +323,63 @@
 }
 
 
+bool CLuaRules::CommandFallback(const CUnit* unit, const Command& cmd)
+{
+	if (!haveCommandFallback) {
+		return true; // the call is not defined
+	}
+
+	lua_settop(L, 0);
+
+	static const LuaHashString cmdStr("CommandFallback");
+	if (!cmdStr.GetGlobalFunc(L)) {
+		lua_settop(L, 0);
+		return true; // the call is not defined
+	}
+
+	// push the unit info
+	lua_pushnumber(L, unit->id);
+	lua_pushnumber(L, unit->unitDef->id);
+	lua_pushnumber(L, unit->team);
+
+	// push the command id
+	lua_pushnumber(L, cmd.id);
+
+	// push the params list
+	lua_newtable(L);
+	for (int p = 0; p < (int)cmd.params.size(); p++) {
+		lua_pushnumber(L, p + 1);
+		lua_pushnumber(L, cmd.params[p]);
+		lua_rawset(L, -3);
+	}
+	HSTR_PUSH_NUMBER(L, "n", cmd.params.size());
+
+	// push the options table
+	lua_newtable(L);
+	HSTR_PUSH_NUMBER(L, "coded", cmd.options);
+	HSTR_PUSH_BOOL(L, "alt",   (cmd.options & ALT_KEY));
+	HSTR_PUSH_BOOL(L, "ctrl",  (cmd.options & CONTROL_KEY));
+	HSTR_PUSH_BOOL(L, "shift", (cmd.options & SHIFT_KEY));
+	HSTR_PUSH_BOOL(L, "right", (cmd.options & RIGHT_MOUSE_KEY));
+
+	// call the function
+	if (!RunCallIn(cmdStr, 6, 0)) {
+		return true;
+	}
+
+	// get the results
+	const int args = lua_gettop(L);
+	if (args != 0) {
+		logOutput.Print("%s() bad return value (%i)\n",
+		                cmdStr.GetString().c_str(), args);
+		lua_settop(L, 0);
+		return true;
+	}
+
+	return true;
+}
+
+
 /******************************************************************************/
 /******************************************************************************/
 //
Index: Lua/LuaRules.h
===================================================================
--- Lua/LuaRules.h	(revision 3598)
+++ Lua/LuaRules.h	(working copy)
@@ -43,7 +43,9 @@
 		                       const CUnit* builder, const float3* pos);
 		bool AllowFeatureCreation(const FeatureDef* featureDef, int allyTeamID,
 		                          const float3& pos);
-		bool AllowUnitTransfer(const CUnit* unit, int newTeam, bool capture);
+		bool AllowUnitTransfer(const CUnit* unit, int newTeam, bool capture);
+
+		bool CommandFallback(const CUnit* unit, const Command& cmd);
 
 	private:
 		CLuaRules();
@@ -79,7 +81,9 @@
 		bool haveAllowCommand;
 		bool haveAllowUnitCreation;
 		bool haveAllowUnitTransfer;
-		bool haveAllowFeatureCreation;
+		bool haveAllowFeatureCreation;
+
+		bool haveCommandFallback;
 
 		map<string, string> infoMap;
 
Index: Sim/Units/CommandAI/CommandAI.cpp
===================================================================
--- Sim/Units/CommandAI/CommandAI.cpp	(revision 3598)
+++ Sim/Units/CommandAI/CommandAI.cpp	(working copy)
@@ -1055,6 +1055,7 @@
     }
 	}
 	ExecuteStateCommand(c);
+	luaRules->CommandFallback(owner, c);
 	FinishCommand();
 }