diplomatic conference, Universal Copyright Convention (1952)
“ Whenever copies of an edition of a work are distributed in the Contracting State to the general public or in connexion with systematic instructional activities, by the owner of the right of reproduction or with his authorization, at a price reasonably related to that normally charged in the State for comparable works, any licence granted under this Article shall terminate if such edition is in the same language and is substantially the same in content as the edition published under the licence. ”
