4. This Protocol 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 Protocol. 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 Protocol. Such organization shall also inform the depositary of any relevant modification in the extent of its competence.
4. 任何国家或任何至少已有一个成员国加入本议定书的区域经济一体化组织均可加入本议定书。加入书应交存联合国秘书长。区域经济一体化组织加入本议定书时应宣布其在本议定书管辖事项方面的权限范围。该组织还应将其权限范围的任何有关变动情况通知保存人。