efg_contested_empire_grace_period_elapsed_trigger

efg_contested_empire_grace_period_elapsed_trigger = {
	trigger_if = {
		limit = {
			OR = {
				NOT = { has_contested_empire_trigger = yes }
				NOT = { faith_has_existing_empire_holder_trigger = yes }
			}
		}
		always = yes
	}
	trigger_else = {
		trigger_if = {
			limit = { is_ai = yes }
			always = yes
		}
		trigger_else = {
			# Player with contested empire: grace period elapsed if no variable (legacy) or current year >= end year.
			OR = {
				NOT = { exists = var:efg_grace_period_end_year }
				current_year >= var:efg_grace_period_end_year
			}
		}
	}
}

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