Artikel XVIII

a). This Agreement shall enter into force sixty days after the date on which it has been signed not subject to ratification, acceptance or approval, or has been ratified, accepted, approved or acceded to, by two-thirds of the States which were parties to the Interim Agreement as of the date upon which this Agreement is opened for signature, provided that such two-thirds include parties to the Interim Agreement which then held at least two-thirds of the quotas under the Special Agreement. Notwithstanding the foregoing provisions, this Agreement shall not enter into force less than eight months or more than eighteen months after the date it is opened for signature.
b). For a State whose instrument of ratification, acceptance, approval or accession is deposited after the date this Agreement enters into force pursuant to paragraph (a) of this Article, this Agreement shall enter into force on the date of such deposit.
c). Upon entry into force of this Agreement pursuant to paragraph (a) of this Article, it may be applied provisionally with respect to any State whose Government signed it subject to ratification, acceptance or approval if that Government so requests at the time of signature or at any time thereafter prior to the entry into force of this Agreement. Provisional application shall terminate:
(i) upon deposit of an instrument of ratification, acceptance or approval of this Agreement by that Government;
(ii) upon expiration of two years from the date on which this Agreement enters into force without having been ratified, accepted or approved by that Government; or
(iii) upon notification by that Government, before expiration of the period mentioned in subparagraph (ii) of this paragraph, of its decision not to ratify, accept or approve this Agreement. If provisional application terminates pursuant to subparagraph (ii) or (iii) of this paragraph, the provisions of paragraph (c) of Article XIV of this Agreement shall govern the rights and obligations of the Party
d). Upon entry into force, this Agreement shall replace and terminate the Interim Agreement.