can_create_temporal_head_of_faith_title_trigger

can_create_temporal_head_of_faith_title_trigger = {
	trigger_if = {
		limit = {
			this = faith:christian_faith
		}
		custom_tooltip = {
			text = pam_great_schism_decision_taken
			has_global_variable = pam_great_schism_decision_taken
		}
	}
	num_realm_holy_sites_faithful_holders = {
		COUNT = holy_sites_to_create_temporal_head_of_faith
		CHARACTER = root
	}
	root.piety_level >= high_piety_level
	trigger_if = {
		limit = { root = { top_liege != this } }
		custom_description = {
			text = cannot_create_hof_title_at_or_above_liege_tier
			root.liege.primary_title.tier > tier_duchy
		}
	}
	root = {
		trigger_if = {
			limit = { faith.religious_head ?= this }
			NOT = {
				custom_tooltip = {
					text = empire_faith_gate_hof_temporal_is_hof
					faith.religious_head ?= this
				}
			}
		}
	}
}

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