The Mexico convention was signed by the United States delegates _ad referendum_, and before submitting it to the Senate for ratification, the President obtained through the Secretary of State an opinion from the Department of Justice, as to any reason against its submission for ratification, especially with reference to the act of 1891. Acting Attorney-General Hoyt replied in a confidential report of June 3, 1902, since made public, after quoting the prohibition of importation in section 3 of the act of 1891: "In the convention now in question there is no inhibition against such importations as are prohibited by said section 3, unless it can be said that such convention is 'an international agreement which provides for reciprocity in the granting of copyrights, by the terms of which agreement the United States of America may, at its pleasure, become a party to such agreement,' as provided in section 13 of the same act. It is a matter of grave doubt whether this convention, made by the United States originally, is such an 'international agreement.' It is therefore quite probable that its ratification would except the authors of the nations signing it from the provisions of said section 3 of the act of March 3, 1891, leaving the authors of other countries still subject to such provisions. Your attention is directed to the fact that an affirmative answer to article 16 of the convention would also except from the provisions of said section 3 all countries that might hereafter adopt said convention. There appears to be no legal impediment to the ratification of this convention, nor would it constitute a breach of faith toward other countries; and in pointing out the probable effect of some of its provisions I do not intend thereby to express or intimate an opinion that it ought not to be ratified." The question of the relation between treaty provisions and domestic legislation especially affects copyright arrangements and has been the subject of discussion and a matter of difficulty in England and other countries as well as in the United States. The Senate did not act finally upon the Mexico convention until 1908, when it was duly ratified, and this precedent opened the way for more prompt ratification of the Buenos Aires convention. {Sidenote: United States international relations}