4. This Convention is open for accession by any State or any regional economic integration organization of which at least one member State is a Party to this Convention. Instruments of accession shall be deposited with the Secretary-General of the United Nations. At the time of its accession, a regional economic integration organization shall declare the extent of its competence with respect to matters governed by this Convention. Such organization shall also inform the depositary of any relevant modification in the extent of its competence.
四、任何国家或者任何至少已经有一个成员国加入本公约的区域经济一体化组织均可以加入本公约。加入书应当交存联合国秘书长。区域经济一体化组织加入本公约时应当宣布其在本公约管辖事项方面的权限范围。该组织还应当将其权限范围的任何有关变动情况通知保存人。