EL SALVADOR-RECIPROCAL TRADE-FEB. 19, 1937 ARTICLE X With respect to customs duties or charges of any kind imposed on or in connection with importation or exportation, and with respect to the method of levying such duties or charges, and with respect to all rules and formalities in connection with importation or exporta- tion, and with respect to all laws or regulations affecting the sale or use of imported goods within the country, any advantage, favor, privilege or immunity which has been or may hereafter be granted by the United States of America or by the Republic of El Salvador to any article originating in or destined for any third country, shall be accorded immediately and unconditionally to the like article originating in or destined for the Republic of El Salvador or the United States of America, respectively. ARTICLE XI Laws, regulations of administrative authorities and decisions of administrative or judicial authorities of the United States of America or the Republic of El Salvador, respectively, pertaining to the classi- fication of articles for customs purposes or to rates of duty shall be published promptly in such a manner as to enable traders to become acquainted with them. Such laws, regulations and decisions shall be applied uniformly at all ports of the respective country, except as otherwise specifically provided in statutes of the United States of America relating to articles imported into Puerto Rico. No administrative ruling by the United States of America or the Republic of El Salvador effecting advances in rates of duties or in charges applicable under an established and uniform practice to imports originating in the territory of the other country, or imposing any new requirement with respect to such importations, shall be effective retroactively or with respect to articles either entered for or withdrawn for consumption prior to the expiration of thirty days after the date of publication of notice of such ruling in the usual official manner. The provisions of this paragraph do not apply to administrative orders imposing anti-dumping duties, or relating to regulations for the protection of human, animal, or plant life, or relat- ing to public safety, or giving effect to judicial decisions. ARTICLE XII In the event that a wide variation occurs in the rate of exchange between the currencies of the United States of America and the Republic of El Salvador, the Government of either country, if it considers the variation so substantial as to prejudice the industries or commerce of the country, shall be free to propose negotiations for the modification of this Agreement or to terminate this Agreement in its entirety on thirty days' written notice. ARTICLE XIII Greater than nominal penalties will not be imposed in the United States of America or in the Republic of El Salvador upon importations of articles the growth, produce or manufacture of the other country because of errors in documentation obviously clerical in origin. The Government of each country will accord sympathetic con- sideration to, and when requested will afford adequate opportunity for consultation regarding, such representations as the other Govern- 1569 Extension of advan- tages, etc., granted another country. Publication oflaws, regulations, and deci- sions. Not retroactive, etc. Anti-dumping du- ties. Modification where exchange rate preju. dicial. Documentation er- rors. Mutual considera- tion respecting cus- toms, etc.