No State shall, without the Consent of the Congress, lay any Imposts or Duties on Imports or Exports, except what may be absolutely necessary for executing it's inspection Laws: and the net Produce of all Duties and Imposts, laid by any State on Imports or Exports, shall be for the Use of the Treasury of the United States; and all such Laws shall be subject to the Revision and Controul of the Congress.
Clause 2
U.S. Const. art. I, § 10, cl. 2, under Section 10.
U.S. Const. art. I, § 10, cl. 2
Clause 2