“所有”包括“兩方”，法律不需要具體說“兩方”。你不是說法律這個東西自己看就可以看懂嗎？
JOINDER OF NECESSARY PARTIES
General Rule 5.03 Every person whose presence is necessary to enable the court to adjudicate effectively and completely on the issues in a proceeding shall be joined as a party to the proceeding.
