I watched it.I find interesting,how to attach reforms to the buildings.
Spoiler Alert, click show to read: 

monitor_event SettlementTurnStart SettlementName Babylon
and I_CompareCounter Romanii_Reform = 2
and I_SettlementOwner Babylon = seleucid
and not SettlementBuildingExists = romani3
and SettlementBuildingExists > muster_field_A
and not SettlementBuildingExists = militia_barracks_A1
and not SettlementBuildingExists = city_barracks_A1
and not SettlementBuildingExists = army_barracks_A1
and not SettlementBuildingExists = militia_barracks_A2
and not SettlementBuildingExists = city_barracks_A2
and not SettlementBuildingExists = army_barracks_A2

console_command create_building Babylon "romani3"
console_command create_building Babylon "royal_barracks_B1"
console_command set_building_health Babylon Barracks_A 0

end_monitor