(1) Countries of the Union which have not ratified or acceded to this Act and which are not bound by Articles 22 to 26 of the Stockholm Act of this Convention may, until April 26, 1975, exercise, if they so desire, the rights provid ed under the said articles as if they were bound by them. Any country desiring to exercise such rights shall give written notification to this effect to the Director General; this notification shall be effective on the date of its receipt. Such countries shall be deemed to be members of the Assembly until the said date.

(2) As long as all the countries of the Union have not become Members of the Organization, the International Bureau of the Organization shall also function as the Bureau of the Union, and the Director General as the Director of the said Bureau.

(3) Once all the countries of the Union have become Members of the Organization, the rights, obligations, and property, of the Bureau of the Union shall devolve on the International Bureau of the Organization.