Artikel 25

After October 31st, 1924, the present Convention may be acceded to by any State represented at the Conference referred to in Article 23 which has not signed the Convention, by any Member of the League of Nations, or by any State to which the Council of the League of Nations shall have communicated a copy of the Convention for this purpose.
Accession shall be effected by an instrument communicated to the Secretary-General of the League of Nations to be deposited in the archives of the Secretariat. The Secretary-General shall at once notify such deposit to all the Members of the League of Nations signatories of the Convention and to the other signatory States.