2. This Convention is subject to ratification. Instruments of ratification shall be deposited with the Secretary-General of the United Nations. Article 18 1. This Convention shall be open to accession by any State referred to in article 17, paragraph 1, of the Convention. 2. Accession shall be effected by the deposit of an instrument of accession with the Secretary-General of the United Nations. Article 19 1. This Convention shall enter into force on the thirtieth day after the date of the deposit with the Secretary-General of the United Nations of the twenty-seventh instrument of ratification or instrument of accession. 2. For each State ratifying this Convention or acceding to it after the deposit of the twenty-seventh instrument of ratification or instrument of accession, the Convention shall enter into force op the thirtieth day after the date of the deposit of its own instrument of ratification or instrument of accession. Article 20 1. The Secretary-General of the United Nations shall receive and circulate to all States which are or may become Parties to this Convention reservations made by States at the time of ratification or accession. Any State which objects to the reservation shall, within a period of ninety days from the date of the said communication, notify the Secretary-General that it does not accept it. 2. A reservation incompatible with the object and purpose of this Convention shall not be permitted, nor shall a reserva­ tion the effect of which would inhibit the operation of any of the bodies established by this Convention be allowed. A reservation shall be considered incompatible or inhibitive if at least two thirds of the States Parties to this Convention object to it. 3. Reservations may be withdrawn at any time by notifica­ tion to this effect addressed to the Secretary-General. Such 
**Analysis**
This text appears to be related to international law and treaties, specifically regarding the ratification and accession process of a convention. The language used is formal and technical, indicating a focus on legal and diplomatic procedures rather than a specific field like economics, environment, or health.

**Category**
International trade, Law