1. This Convention shall be ratified by the signatory States. The instruments of ratification shall be deposited with the depositary which shall notify all other signatory States.
2. This Convention shall enter into force four months after deposit of the fourth instrument of ratification. In relation to any other signatory State depositing subsequently its instrument of ratification this Convention shall enter into force two months after the date of deposit but not before the expiry of the above-mentioned period of four months.