Congressional delegation of legislative authority is an implied power of Congress that is constitutional so long as Congress provides an "intelligible principle" to guide the executive branch. Decided April 9, 1928 (argued March 1, 1928). Opinion of the Court: William Howard Taft → go there Topic: Separation of powers. J. W. Hampton, Jr. & Co. v. United States, 276 U.S. 394 (1928), is a landmark case in the United States in which the Supreme Court of the United States ruled that congressional delegation of legislative authority is an implied power of Congress that is constitutional so long as Congress provides an "intelligible principle" to guide the executive branch. Wiki link