"Unauthorized indirect use" or reprint under pretext of annotations or criticism (art. 12) was specified as unlawful reproduction. Pirated copies might be seized (art. 13) in any of the countries, without prejudice to other punishment of the infringer. Each country was to exercise (art. 14) police power in its own jurisdiction. The convention was to become effective for each signatory power three months after communication of its ratification to the Mexican government, and any participant might withdraw after one year's notice of denunciation, the convention to remain binding on the other powers. The signatory powers were to declare (art. 16) whether they would accept accession from countries unrepresented at the conference. {Sidenote: Ratification} The Mexico convention of 1902 was ratified by Guatemala (1902), Salvador (1902), Costa Rica (1902), Honduras (1904) and Nicaragua (1904), and by the United States (1908), perhaps also by the Dominican Republic and Cuba, and does not seem to be operative in the other countries whose representatives signed the treaty. {Sidenote: Rio de Janeiro conference 1906} At the third Pan American conference, held at Rio de Janeiro, in 1906, a convention was signed August 23, 1906, to protect patents of invention, drawings and industrial models, trade-marks and literary and artistic property, thus binding in one document patent and copyright protection. This is usually referred to as the third Pan American treaty, but it has not been accepted by the United States, partly because of objections to patent provisions and the combination of copyright provisions with them. {Sidenote: Rio provisions}