sort_co_emperor_candidates_to_list_effect

sort_co_emperor_candidates_to_list_effect = {
	scope:actor = {
		every_close_or_extended_family_member = {
			limit = {
				valid_co_emperor_candidate_trigger = { LIEGE = scope:actor }
			}
			add_to_list = characters
		}
		every_vassal = {
			limit = {
				valid_co_emperor_candidate_trigger = { LIEGE = scope:actor }
			}
			add_to_list = characters
		}
	}
}

As written in game/common/scripted_effects/00_diarchy_scripted_effects.txt.