Artikel 28

Any State not represented at the Tenth Session of the Hague Conference on Private International Law may accede to the present Convention after it has entered into force in accordance with the first paragraph of article 27. The instrument of accession shall be deposited with the Ministry of Foreign Affairs of the Netherlands.
The Convention shall enter into force for such a State in the absence of any objection from a State, which has ratified the Convention before such deposit, notified to the Ministry of Foreign Affairs of the Netherlands within a period of six months after the date on which the said Ministry has notified it of such accession.
In the absence of any such objection, the Convention shall enter into force for the acceding State on the first day of the month following the expiration of the last of the periods referred to in the preceding paragraph.