confederation_foe_trigger

confederation_foe_trigger = {
	save_temporary_scope_as = confederate

	#NEED TO UPDATE CUSTOM TOOLTIP WHENEVER THESE TRIGGERS ARE CHANGED
	custom_tooltip = {
		text = confederation_threat_tt
		#I'M FRICKING SERIOUS ABOUT THAT
		OR = {
			#Threat is in same de jure kingdom as capital county
			capital_county = {
				kingdom = {
					any_de_jure_county = {
						holder.top_liege = {
							confederation_foe_sub_trigger = { CHARACTER = $CHARACTER$ }
						}
					}
				}
			}
			#Threat borders you or your tributaries
			any_land_neighboring_realm_with_tributaries_owner = {
				confederation_foe_sub_trigger = { CHARACTER = $CHARACTER$ }
			}
			#You border threat's direct tributaries
			any_land_neighboring_realm_with_tributaries_owner = {
				exists = suzerain
				suzerain = {
					confederation_foe_sub_trigger = { CHARACTER = $CHARACTER$ }
				}
			}
			#You border threat's lower level tributaries
			any_land_neighboring_realm_with_tributaries_owner = {
				is_tributary = yes
				top_suzerain = {
					confederation_foe_sub_trigger = { CHARACTER = $CHARACTER$ }
				}
			}
		}
	}
}

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