Acts of Congress made by the first two methods. If an act is made by the third method, the presiding officer of the house that last reconsidered the act promulgates it. Under the United States Constitution, if the president does not return a bill or resolution to Congress with objections before the time limit expires, then the bill automatically becomes an act; however, if the Congress is adjourned at the end of this period, then the bill dies and cannot be reconsidered (see pocket veto). If the President rejects a bill or resolution while the Congress is in session, a two-thirds vote of both houses of Congress is needed for reconsideration to be successful. Promulgation in the sense of publishing and proclaiming the law is accomplished by the president, or the relevant presiding officer in the case of an overridden veto, delivering the act to the archivist of the United States. The archivist provides for its publication as a slip law and in the United States Statutes at Large after receiving the act. Thereafter, the changes are published in the United States Code. Judicial review and constitutionality Through the process of judicial review, an Act of Congress that violates the Constitution may be declared unconstitutional by the courts. A judicial declaration that an Act of Congress is unconstitutional does not remove the Act from the Statutes at Large or the United States Code; rather, it prevents the Act from being enforced. However, the Act as published in annotated codes and legal databases is marked with annotations indicating that it is no longer good law. See also Legislation List of United States federal legislation for a list of prominent Acts of Congress. Procedures of the United States Congress Act of Parliament Coming into force Enactment Federal Register References External links Act of Congress – Glossary Act of Congress