are barred from reviewing a state court’s interpretation of a state statute. Ibid. Cf. Mullaney v. Wilbur, 421 U. S. 684, 691; Scripto, Inc. v. Carson, 362 U. S. 207, 210; Murdock v. Memphis, 20 Wall. 590, 632-633.
In this case we have concluded that the customary deference to the District of Columbia Court of Appeals’ construction of local federal legislation is inappropriate with respect to the statutes involved, for the reason that the petitioner’s claim under the Double Jeopardy Clause cannot be separated entirely from a resolution of the question of statutory construction. The Fifth Amendment guarantee against double jeopardy protects not only against a second trial for the same offense, but also “against multiple punishments for the same offense,” North Carolina v. Pearce, supra, at 717 (footnote omitted). But the question whether punishments imposed by a court after a defendant’s conviction upon criminal charges are unconstitutionally multiple cannot be resolved without determining what punishments the Legislative Branch has authorized. See Gore v. United States, 357 U. S. 386, 390; id., at 394 (Warren, C. J., dissenting on statutory grounds); Bell v. United States, 349 U. S. 81, 82; Ex parte Lange, 18 Wall. 163, 176; see also Brown v. Ohio, 432 U. S. 161, 165; United States v. Universal C. I. T. Credit Corp., 344 U. S. 218; Blockburger v. United States, 284 U. S. 299; Ebeling v. Morgan, 237 U. S. 625.
It is not at all uncommon, for example, for Congress or a state legislature to provide that a single criminal offense may be punished both by a monetary fine and by a term of imprisonment. In that situation, it could not be seriously argued that the imposition of both a fine and a prison sentence in accordance with such a provision constituted an impermissible punishment. But if a penal statute instead provided for a fine or a term of imprisonment upon conviction, a court could not impose both punishments without running afoul of the double jeopardy guarantee of the Constitution. See Ex parte Lange, supra, at 176. Cf. Bozza v. United States, 330 U. S. 160, 167. In the present case, therefore, if Congress has not authorized