(a) The law of a State Party; (b) International law in force for that State. Article 38 1. This Convention is open for signature by all Member States of the United Nations. 2. This Convention is subject to ratification by all Member States of the United Nations. Instruments of ratification shall be deposited with the Secretary-General of the United Nations. 3. This Convention is open to accession by all Member States of the United Nations. Accession shall be effected by the deposit of an instrument of accession with the Secretary-General. Article 39 1. This Convention shall enter into force on the thirtieth day after the date of deposit with the Secretary-General of the United Nations of the twentieth instrument of ratification or accession. 2. For each State ratifying or acceding to this Convention after the deposit of the twentieth instrument of ratification or accession, this Convention shall enter into force on the thirtieth day after the date of the deposit of that State’s instrument of ratification or accession. Article 40 The Secretary-General of the United Nations shall notify all States Members of the United Nations and all States which have signed or acceded to this Convention of the following: (a) Signatures, ratifications and accessions under article 38; (b) The date of entry into force of this Convention under article 39. Article 41 The provisions of this Convention shall apply to all parts of federal States without any limitations or exceptions. 61