tgp_liege_change_bloc_management_effect

tgp_liege_change_bloc_management_effect = {
	$VASSAL$ = {
		if = { # Leave if not a valid member anymore
			limit = {
				OR = {
					exists = confederation.leading_house
					exists = house.house_confederation
				}
			}
			save_temporary_scope_as = vassal_temp
			house ?= { save_temporary_scope_as = vassal_house_temp }
			liege ?= { save_temporary_scope_as = new_liege }
			confederation ?= {
				save_temporary_scope_as = current_bloc_temp
				leading_house = { save_temporary_scope_as = current_bloc_leader_temp }
			}
			house.house_confederation ?= {
				save_temporary_scope_as = current_house_bloc_temp
				leading_house = { save_temporary_scope_as = current_house_bloc_leader_temp }
			}
			if = {
				limit = {
					exists = scope:current_bloc_temp
					exists =  scope:old_liege
					trigger_if = { # If a vassal
						limit = { is_independent_ruler = no }
						scope:new_liege.liege != scope:old_liege.liege
						scope:new_liege = {
							is_independent_ruler = no
						}
					}
					trigger_else = {
						NOT = { scope:vassal_temp = scope:old_liege.top_liege }
					}
				}
				scope:current_bloc_temp = {
					if = {
						limit = {
							scope:vassal_temp = {
								is_house_head = yes
								house.house_confederation = scope:current_bloc_temp
								scope:new_liege = {
									is_independent_ruler = no
								}
							}
						}
						scope:vassal_house_temp = {
							tgp_leave_house_bloc_effect = {
								OPINION = flag:no
								TRUCE = flag:yes
							}
						}
					}
					else_if = {
						limit = { scope:vassal_temp.confederation = scope:current_bloc_temp }
						remove_confederation_member = scope:vassal_temp
					}
				}
				debug_log = "Bloc liege change member leave"
				debug_log_scopes = yes
			}
			if = { # Join if not a member of valid
				limit = {
					is_house_head = no
					exists = scope:current_house_bloc_temp
					scope:vassal_house_temp.house_head.liege ?= liege
					NOT = { confederation = scope:vassal_house_temp.house_confederation }
				}
				confederation ?= {
					save_temporary_scope_as = current_bloc_temp
					remove_confederation_member = scope:vassal_temp
				}
				house.house_confederation = {
					save_temporary_scope_as = house_bloc_temp
					add_confederation_member = scope:vassal_temp
				}
				debug_log = "Bloc liege change member join"
				debug_log_scopes = yes
			}
		}
	}
}

As written in game/common/scripted_effects/10_dlc_tgp_japan_scripted_effects.txt.