A/RES/51/46 Page 9 Have agreed as follows: Article 1 The States Parties to the present Convention solemnly undertake not to use or threaten to use nuclear weapons under any circumstances. Article 2 This Convention shall be of unlimited duration. Article 3 1. The present Convention shall be open to all States for signature. Any State that does not sign the Convention before its entry into force in accordance with paragraph 3 of the present article may accede to it at any time. 2. The present Convention shall be subject to ratification by signatory States. Instruments of ratification or accession shall be deposited with the Secretary-General of the United Nations. 3. The present Convention shall enter into force on the deposit of instruments of ratification by twenty-five Governments, including the Governments of the five nuclear-weapon States, in accordance with paragraph 2 of the present article. 4. For States whose instruments of ratification or accession are deposited after the entry into force of the Convention, it shall enter into force on the date of the deposit of their instruments of ratification or accession. 5. The depositary shall promptly inform all signatory and acceding States of the date of each signature, the date of deposit of each instrument of ratification or accession and the date of entry into force of this Convention, as well as of the receipt of other notices. 6. The present Convention shall be registered by the depositary in accordance with Article 102 of the Charter of the United Nations. Article 4 The present Convention, of which the Arabic, Chinese, English, French, Russian and Spanish texts are equally authentic, shall be deposited with the Secretary-General of the United Nations, who shall send duly certified copies thereof to the Governments of the signatory and acceding States. IN WITNESS WHEREOF, the undersigned, being duly authorized thereto by their respective Governments, have signed the present Convention, opened for signature at on the day of one thousand nine hundred and . /...