is_clerical_appointment_valid_trigger

is_clerical_appointment_valid_trigger = {
	$TITLE$ = { save_temporary_scope_as = title_temp }
	$CANDIDATE$ = { save_temporary_scope_as = candidate_temp }
	$TOP_LIEGE$ = { save_temporary_scope_as = top_liege_temp }
	trigger_if = {
		limit = { exists = scope:title_temp }
		custom_tooltip = { # Has relevant law
			text = has_appointment_succession_tt
			$TITLE$ = {
				OR = {
					has_title_law = clerical_appointment_law
					holder ?= { has_realm_law = clerical_appointment_law }
				}
			}
		}
		custom_tooltip = { # Titles below the holder's primary tier are inherited alongside it, so they cannot be contested on their own
			text = follows_other_title_appointment_tt
			scope:title_temp.holder ?= { primary_title.tier = scope:title_temp.tier }
		}
	}
	is_clerical_appointment_valid_base_trigger = {
		CANDIDATE = $CANDIDATE$
		TOP_LIEGE = $TOP_LIEGE$
	}
}

As written in game/common/scripted_triggers/pam_scripted_triggers.txt.