Speaker of the United States House of Representatives by the President "pro tempore" of the Senate and by the heads of federal executive departments. To date, the implementation of the Presidential Succession Act has never been necessary and no Speaker has ever acted as President. Implementation of the law almost became necessary in 1973 after the resignation of Vice President Spiro Agnew. At the time, many believed that President Richard Nixon would resign because of the Watergate scandal, allowing Speaker Carl Albert to succeed to the Presidency. However, before he resigned, Nixon appointed Gerald Ford as Vice President in accordance with the Twenty-fifth Amendment. Nevertheless, the United States
Acting President of the United States thirty-five years old; and be a resident in the United States for at least fourteen years. A person who meets these requirements may still be constitutionally disqualified from the presidency under any of the following conditions: Article II, Section 1, Clause 6 makes the vice president first in the line of succession. It also empowers Congress to provide by law who would act as president in the case where neither the president nor the vice president were able to serve. Two constitutional amendments elaborate on the subject of presidential succession and fill gaps exposed over time in the original provision: