| http://www.w3.org/ns/prov#value | - duties on imports imposed by law, nor to prevent the passage of any act prior to the 30th day of June, 1842, in the contingency either of excess or deficiency of revenue, altering the rates of duties on articles which, by the aforesaid act of 14th of July, 1832, are subject to a less rate of duty than twenty per centum, as valorem, in such manner as not to exceed that rate, and so as to adjust th
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