1570 Provisions not to apply to Philippine Islands, etc. Preferential treat- ment extended to ter- ritories, etc. , of each other. Ante, p. 1569. Canal Zone exclud- ed. Adjacent countries. Exceptions. Philippine Islands. Commerce of El Salvador with Costa Rica, etc. Police and sanitary regulations. Gold or silver ex- portation. Traffic n arms, etc. Adoption of meas- ures Impairing Agree- ment; adjustment. INTERNATIONAL AGREEMENTS OTHER THAN TREATIES ment may make with respect to the operation of customs regulations, quantitative restrictions or the administration thereof, the observance of customs formalities, and the application of sanitary laws and regulations for the protection of human, animal, or plant life. ARTICLE XIV Except as otherwise provided in the second paragraph of this Article, the provisions of this Agreement relating to the treatment to be accorded by the United States of America or by the Republic of El Salvador, respectively, to the commerce of the other country, shall not apply to the Philippine Islands, the Virgin Islands, American Samoa, the Island of Guam, or to the Panama Canal Zone. Subject to the reservations set forth in the third, fourth, and fifth paragraphs of this Article, the provisions of Article X shall apply to articles the growth, produce or manufacture of any territory under the sovereignty or authority of the United States of America or of the Republic of El Salvador, imported from or exported to any territory under the sovereignty or authority of the other country. It is understood, however, that the provisions of this paragraph do not apply to the Panama Canal Zone. The advantages now accorded or which may hereafter be accorded by the United States of America or by the Republic of El Salvador to adjacent countries in order to facilitate frontier traffic, and advan- tages resulting from a customs union to which either the United States of America or the Republic of El Salvador may become a party, shall be excepted from the operation of this Agreement. The advantages now accorded or which may hereafter be accorded by the United States of America, its territories or possessions or the Panama Canal Zone to one another or to the Republic of Cuba shall be excepted from the operation of this Agreement. The provisions of this paragraph shall continue to apply m respect of any advantages now or hereafter accorded by the United States of America, its terri- tories or possessions or the Panama Canal Zone to the Philippine Islands irrespective of any change in the political status of the Philip- pine Islands. The advantages now accorded or which may hereafter be accorded by the Republic of El Salvador to the commerce of Costa Rica Guatemala, Honduras, Nicaragua or Panama, so long as any special treatment accorded to the commerce of those countries or any of them by the Republic of El Salvador is not accorded to any other country, shall be excepted from the operation of this Agreement. Unless otherwise specifically provided in this Agreement, the pro- visions thereof shall not be construed to apply to police or sanitary regulations; and nothing in this Agreement shall be construed to pre- vent the adoption of measures prohibiting or restricting the exporta- tion of gold or silver, or to prevent the adoption of such measures as either Government may see fit with respect to the control of the export or sale for export of arms, munitions, or implements of war, and, in exceptional circumstances, all other military supplies. ARTICLE XV In the event that the Government of the United States of America or the Government of El Salvador adopts any measure which, even though it does not conflict with the terms of this Agreement, is con- sidered by the Government of the other country to have the effect of nullifying or impairing any object of the Agreement, the Government which has adopted any such measure shall consider such representa- tions and proposals as the other Government may make with a view to effecting a mutually satisfactory adjustment of the matter.