Article 26

(1) This Agreement shall enter into force one month after the date on which the Director General has dispatched a notification to the contracting States of the deposit of ten instruments of ratification or accession, at least four of which are those of States which, at the date of the present Agreement, are not party either to the 1925 Agreement or to the 1934 Agreement.

(2) Thereafter, the deposit of instruments of ratification and accession shall be notified to the contracting States by the Director General. Such ratifications and accessions shall become effective one month after the date of the dispatch of such notification unless, in the case of accession, a later date is indicated in the instrument of accession.