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Show -85- of the waters of the Rio Grande. So far, therefore, as these European treaties affect the international law of the world, it may be assumed that the United States has accepted the principles thereof for this nation. And if considered merely as the conventional practice of the signatory nations, yet the simili- tude of adjustments between conflicting national interests so diverse is convincing evidence that these principles represent the seasoned judgment of many statesmen as to what the law of international waters ought to be if it has not been so established. What better guide can be found for the making of compacts, or for the judicial decision of controversies, among the States of the American Union in relation to their interstate waters? "Art. 21 'The High Contracting Parties recognize mutually an equality of rig;ht in the waters of La Roya and its tributaries in all the parts where these watercourses form the frontier between France and Italy, Consequently, each one of the two States declares that it may not, on its territory, use or permit to be used, the water in such a manner as to injure the equal right of user by the other State or its inhabitants, on the other bank, without the ¦6onsent of the latter* "'nevertheless • . « the Government of the French Republic agrees that be- tween the streams cf Groa and Paganin, the usage of the waters shall be ief*t entirely to the disposition of the Italian bank, and between the ravine of the Masque and the valley of Rio, the Government of His Majesty the King of Ita-ly agrees that the usage of the waters be left entirely to the disposition of the French bank.T "f. The treaties of Versailles (art. 337), of St. Germain (art. 298), of Keuilly (art. 226), and of Trianon (art. 282) stipulate that when a riparian State undertakes, in the international part of a river, any works of such a nature as to hinder navigation, the other riparian States or any of the States represented on the international commission, if there is one, shall have the right to appeal to the jurisdiction instituted by the League of Nations in this regard which shall have power to decree the suspension or suppression of such works in taking into account rights relative to irrigation, to hydraulic forces, fisheries, and other national interests which, in case of accord among all the riparian States or those represented on the commission, shall have priority over the needs of navigation. Further provisions of a similar nature are found in art* 35&t 359 of the treaty of Versailles and art. 3&3 °^ "k*10 treaty of Sevres, . . • . • "k. Treaty between Germany and Denmark, April 10, 1922 (L. of K. Treaty Series, Vol. X, p. 201) art* 29; 'The establishment of new, or the extensive alteration of existing works on any of the watercourses mentioned in article 1, require the authorization of the Frontier Water Commission. This provision shall apply in particular to the right: "(1) of using and consuming water, especially the right of diverting it directly or indirectly and above or beneath the land surface; "(2) of conveying water or other licmids directly or indirectly and over or under the land surfacej • w(3) °^ lowering or raising the level of the water, especially the ri-ght of causing a permanent accumulation of water, by checking the flow of the stream. . |