Brown v. Maryland, 25 U.S. (12 Wheat.) 419 (1827), was a significant United States Supreme Court case which interpreted the Import-Export and Commerce Clauses of the U.S. Constitution to prohibit discriminatory taxation by states against imported items after importation, rather than only at the time of importation. The state of Maryland passed a law requiring importers of foreign goods to obtain a license for selling their products. Brown was charged under this law and appealed. It was the first case in which the U.S. Supreme Court construed the Import-Export Clause. Chief Justice John Marshall delivered the opinion of the court, ruling that Maryland's statute violated the Import-Export and Commerce Clauses and the federal law was supreme. He alleged that the power of a state to tax goods