The Constitution of the United States · Art. I, § 8, cl. 1

The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;

United States · 1787 and amendments I–XXVII
National Archives transcriptions of the 1787 parchment and amendments I–XXVII; original wording, including superseded provisions.
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