Article 18
1. This Convention shall enter into force two years after the date of the deposit of the sixth instrument
of ratification or accession.
2. For each State ratifying or acceding to this Convention after the deposit of the sixth instrument of
ratification or accession, it shall enter into force on the ninetieth day after the deposit by such State of
its instrument of ratification or accession or on the date on which this Convention enters into force in
accordance with the provisions of paragraph 1 of this article, whichever is the later.