The Marriage Protection Act of 2004 (MPA) was a bill introduced in the United States Congress in 2003 to amend the federal judicial code to deny federal courts jurisdiction to hear or decide any question pertaining to the interpretation of the Defense of Marriage Act (DOMA) or the MPA itself.

The version approved by the House of Representatives would have added this text as Section 1632 to Chapter 99 in Part IV of Title 28 of the United States Code (28 U.S.C.

§ 1632), governing the judiciary and judicial procedures: No court created by Act of Congress shall have any jurisdiction, and the Supreme Court shall have no appellate jurisdiction, to hear or decide any question pertaining to the interpretation of, or the validity under the Constitution of, section 1738C or this section.28 U.S.C.

The proposed legislation raises Constitutional questions in relation to the Full Faith and Credit Clause.

[1] The Act was designed to protect DOMA by prohibiting federal courts from hearing cases like that of Nancy Wilson, who sued to have her relationship with Paula Schoenwether treated as marriage in Florida because it had been treated as marriage in Massachusetts.