Whereas by an act of the Congress of the United States of the 24th of May, 1828, entitled "An act in addition to an act entitled 'An act concerning discriminating duties of tonnage and impost,' and to equalize the duties on Prussian vessels and their cargoes," it is provided that upon satisfactory evidence being given to the President of the United States by the government of any foreign nation that no discriminating duties of tonnage or impost are imposed or levied in the ports of the said nation upon vessels wholly belonging to citizens of the United States, or upon the produce, manufactures, or merchandise imported in the same from the United States or from any foreign country, the President is thereby authorized to issue his proclamation declaring that the foreign discriminating duties of tonnage and impost within the United States are, and shall be, suspended and discontinued so far as respects the vessels of the said foreign nation and the produce, manufactures, or merchandise imported into the United States in the same from the said foreign nation or from any other foreign country, the said suspension to take effect from the time of such notification being given to the President of the United States and to continue so long as the reciprocal exemption of vessels belonging to citizens of the United States, and their cargoes, as aforesaid, shall be continued, and no longer; and Whereas satisfactory evidence has lately been received by me from His Royal Highness the Grand Duke of Oldenburg, through an official communication of F.A. Mensch, his consul in the United States, under date of the 15th of September, 1830, that no discriminating duties of tonnage or impost are imposed or levied in the ports of the Grand Dukedom of Oldenburg upon vessels wholly belonging to citizens of the United States or upon the produce, manufactures, or merchandise imported in the same from the United States or from any other country: Now, therefore, I, Andrew Jackson, President of the United States of America, do hereby declare and proclaim that so much of the several acts imposing discriminating duties of tonnage and impost within the United States are, and shall be, suspended and discontinued so far as respects the vessels of the Grand Dukedom of Oldenburg and the produce, manufactures, and merchandise imported into the United States in the same from the Grand Dukedom of Oldenburg and from any other foreign country whatever, the said suspension to take effect from the day above mentioned and to continue thenceforward so long as the reciprocal exemption of the vessels of the United States and the produce, manufactures, and merchandise imported into the Grand Dukedom of Oldenburg in the same, as aforesaid, shall be continued on the part of the Government of His Royal Highness the Grand Duke of Oldenburg. Given under my hand, at the city of Washington, the 18th day of September, A.D. 1830, and the fifty-fifth of the Independence of the United States.