petition_liege_council_seat_liege_trigger

petition_liege_council_seat_liege_trigger = {
	liege ?= {
		OR = {
			cp:councillor_chancellor ?= {
				NOT = {
					is_blocked_from_being_fired_from_council_trigger = { COURT_OWNER = root.liege }
				}
			}
			cp:councillor_marshal ?= {
				NOT = {
					is_blocked_from_being_fired_from_council_trigger = { COURT_OWNER = root.liege }
				}
			}
			cp:councillor_steward ?= {
				NOT = {
					is_blocked_from_being_fired_from_council_trigger = { COURT_OWNER = root.liege }
				}
			}
			cp:councillor_spymaster ?= {
				NOT = {
					is_blocked_from_being_fired_from_council_trigger = { COURT_OWNER = root.liege }
				}
			}
			trigger_if = {
				limit = { root.faith = root.liege.faith }
				root.rite = { rite_has_doctrine = doctrine_clerical_succession_temporal_appointment }
				cp:councillor_court_chaplain ?= {
					NOT = {
						is_blocked_from_being_fired_from_council_trigger = { COURT_OWNER = root.liege }
					}
				}
			}
			NOT = { exists = cp:councillor_chancellor }
			NOT = { exists = cp:councillor_marshal }
			NOT = { exists = cp:councillor_steward }
			NOT = { exists = cp:councillor_spymaster }
			trigger_if = {
				limit = { root.faith = root.liege.faith }
				root.rite = { rite_has_doctrine = doctrine_clerical_succession_temporal_appointment }
				NOT = { exists = cp:councillor_court_chaplain }
			}
		}
	}
}

As written in game/common/scripted_triggers/00_activity_triggers.txt.