The United States Presidential Succession Act is a federal statute establishing the presidential line of succession. Article II, Section 1, Clause 6 of the United States Constitution authorizes Congress to enact such a statute: Congress may by Law provide for the Case of Removal, Death, Resignation or Inability, both of the President and Vice President, declaring what Officer shall then act as President, and such Officer shall act accordingly, until the Disability be removed, or a President shall be elected.