U.S. Constitution, Article I — The Legislative Branch, Section 10, Clause 2
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.
Notes
Bars states from laying imposts or duties on imports or exports without the consent of Congress, except what is absolutely necessary for executing their inspection laws. Requires the net produce of any such duties to go to the Treasury of the United States and makes such state laws subject to revision and control by Congress.
Use as reference
Lexinter.net | U.S. Const. art. I, § 10, cl. 2 | https://laws.lexinter.net/constitution/us/article-1/section-10/clause-2