is_coronation_artifact_trigger

is_coronation_artifact_trigger = {
	artifact_owner = {
		trigger_if = {
			limit = {
				faith = {
					coronation_proper_artifact_crown_trigger = yes
					coronation_proper_artifact_regalia_trigger = no
				}
			}
			prev = {
				artifact_slot_type = helmet
			}
		}
		trigger_else_if = {
			limit = {
				faith = {
					coronation_proper_artifact_regalia_trigger = yes
					coronation_proper_artifact_crown_trigger = no
				}
			}
			prev = {
				artifact_slot_type = regalia
			}
		}
		trigger_else = {
			prev = {
				OR = {
					artifact_slot_type = helmet
					artifact_slot_type = regalia
				}
			}
		}
	}
}

As written in game/common/scripted_triggers/10_ach_scripted_triggers.txt.