pam_church_event_background_is_grand_eastern_trigger

pam_church_event_background_is_grand_eastern_trigger = {
	trigger_if = {
		limit = {
			scope:activity.activity_location ?= {
				faith.religion = religion:christianity_religion
			}
		}
		scope:activity.activity_location.rite = {
			rite_has_doctrine = special_doctrine_is_eastern_christian_faith
		}
	}
	trigger_else_if = {
		limit = {
			exists = scope:activity.activity_host
		}
		scope:activity.activity_host.rite = {
			rite_has_doctrine = special_doctrine_is_eastern_christian_faith
		}
	}
	trigger_else = {
		location.rite ?= {
			rite_has_doctrine = special_doctrine_is_eastern_christian_faith
		}
	}
	OR = {
		AND = {
			this = faith.religious_head
			highest_held_title_tier >= tier_kingdom
			capital_county.faith ?= faith
		}
		domicile ?= { has_domicile_building_or_higher = ecclesiastical_domicile_main_03 }
		capital_county ?= {
			any_county_province = {
				has_building_with_flag = { flag = grand_cathedral_flag }
			}
		}
		holy_order ?= {
			num_leased_titles >= 12
		}
	}
}

As written in game/common/scripted_triggers/pam_scripted_triggers.txt.