can_change_succession_laws_realm_flag_trigger

can_change_succession_laws_realm_flag_trigger = {
	trigger_if = {
		limit = { realm_law_use_tribal_authority = yes }
		custom_description = {
			text = "has_tribal_law_allowing_succession_law_change"
			has_realm_law_flag = can_change_succession_laws
		}
	}
	trigger_else_if = {
		limit = { realm_law_use_imperial_bureaucracy = yes }
		custom_description = {
			text = has_imperial_bureaucracy_law_allowing_succession_law_change
			has_realm_law_flag = can_change_succession_laws
		}
	}
	trigger_else_if = {
		limit = { government_has_flag = government_is_japan_feudal }
		custom_description = {
			text = has_crown_law_allowing_succession_law_change_japanese_feudal
			has_realm_law_flag = can_change_succession_laws
		}
	}
	trigger_else = {
		custom_description = {
			text = "has_crown_law_allowing_succession_law_change_feudal"
			has_realm_law_flag = can_change_succession_laws
		}
	}
}

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