can_have_single_heir_succession_law_trigger

can_have_single_heir_succession_law_trigger = {
	trigger_if = { # Celestial/Meritocratic/Soryo
		limit = {
			OR = {
				government_allows = merit
				government_has_flag = government_is_japan_feudal
			}
		}
		custom_tooltip = { # You are independent, have the innovation or are Ceremonial Monarch
			text = can_have_single_heir_succession_law_trigger_merit_or_japan_tt
			OR = {
				is_independent_ruler = yes
				culture = {
					has_innovation = innovation_primogeniture
				}
				tgp_has_ceremonial_liege_title_trigger = yes
			}
		}
	}
	trigger_else_if = {
		limit = { tgp_realm_has_ceremonial_liege_trigger = yes }
		tgp_has_ceremonial_liege_title_trigger = yes
	}
	trigger_else = {
		culture = {
			has_innovation = innovation_primogeniture
		}
	}
	# Non-tribals only
	trigger_if = { # We split the tooltip into two, to make sure we don't show admin unless you actually have it
		limit = {
			has_ep3_dlc_trigger = yes
		}
		custom_tooltip = {
			text = must_be_feudal_clan_or_admin
			OR = {
				government_has_flag = government_is_feudal
				government_has_flag = government_is_clan
				government_has_mechanic = administrative
				government_has_flag = government_is_japan_feudal
				tgp_has_ceremonial_liege_title_trigger = yes
			}
		}
	}
	trigger_else = {
		custom_description = {
			text = succession_laws_must_have_organised_government_tooltip
			OR = {
				government_has_flag = government_is_feudal
				government_has_flag = government_is_clan
				government_allows = merit
				government_has_flag = government_is_japan_feudal
				tgp_has_ceremonial_liege_title_trigger = yes
			}
		}
	}
	# Admin rules
	trigger_if = {
		limit = { government_has_mechanic = administrative }
		trigger_if = {
			limit = { tgp_realm_has_ceremonial_liege_trigger = yes }
			tgp_has_ceremonial_liege_title_trigger = yes
		}
		trigger_else = { is_independent_ruler = yes }
	}
}

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