pam_potential_merge_clerical_region_title_trigger

pam_potential_merge_clerical_region_title_trigger = {
	$TITLE$ = {
		has_clerical_region = yes
		is_head_of_faith = no
		# Absorbed regions stay as empty picker shells until reload
		clerical_region_size > 0
		custom_tooltip = {
			text = pam_potential_merge_clerical_region_title_same_title_trigger
			this != $ABSORBING_TITLE$
		}
		trigger_if = {
			limit = { exists = holder }
			custom_tooltip = {
				text = request_elevation_cannot_unseat_player_tt
				holder = { is_ai = yes }
			}
			custom_tooltip = {
				text = pam_potential_merge_clerical_region_title_rite_trigger
				NOT = { rite.head_of_rite ?= holder }
			}
			custom_tooltip = {
				text = pam_potential_merge_clerical_region_title_same_hof_trigger
				holder.religious_head_or_challenger = $ABSORBING_TITLE$.holder.religious_head_or_challenger
			}
		}
		trigger_else = {
			custom_tooltip = {
				text = pam_potential_merge_clerical_region_title_no_holder_trigger
				exists = holder
			}
		}
	}
	$ABSORBING_TITLE$ ?= {
		has_clerical_region = yes
		is_head_of_faith = no
		custom_tooltip = {
			text = pam_potential_merge_clerical_region_title_neighboring_trigger
			any_county_in_clerical_region = {
				any_neighboring_county = { clerical_region_title ?= $TITLE$ }
			}
		}
	}
}

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