holder_or_above_is_player_of_culture

holder_or_above_is_player_of_culture = {
	culture = {
		save_temporary_scope_as = this_culture
	}
	OR = {
		holder = {
			AND = {
				is_ai = no
				culture = scope:this_culture
			}
			any_liege_or_above = {
				is_ai = no
				culture = scope:this_culture
			}
		}
	}
}

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