game_rule_lenient_gender_equality_effect

game_rule_lenient_gender_equality_effect = {
	## REALM LAW
	every_ruler = {
		# Theocratic gender laws are dictated by the Clerical Gender doctrine, so they have no preference laws to relax into.
		limit = {
			NOT = { government_has_flag = government_is_theocracy }
		}
		# Take care of any titles with their own title laws.
		every_held_title = {
			limit = { can_title_have_law_general_trigger = yes }
			# Make male only -> male preference.
			if = {
				limit = { has_title_law = male_only_law }
				remove_title_law = male_only_law
				add_title_law = male_preference_law
			}
		}
		# Now realm law.
		if = {
			limit = { has_realm_law = male_only_law }
			add_realm_law = male_preference_law
		}
	}
}

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