Section 145 of the 1999 Constitution of Nigeria
Section 145 of the Constitution of Nigeria 1999 is about Acting President during temporary absence of President. It is under Chapter VI (The Executive) of the Act.
(1) Whenever the President is proceeding on vacation or is otherwise unable to discharge the functions of his Office, he shall transmit a written declaration to the President of the Senate and the Speaker of the House of Representatives to that effect, and until he transmits to them a written declaration to the contrary, the Vice-President shall perform the functions of the President as Acting President.
(2) In the event that the President is unable or fails to transmit the written declaration mentioned in subsection (1) of this section within 21 days, the National Assembly shall, by a resolution made by a simple majority of the vote of each House of the National Assembly, mandate the Vice-President to perform the functions of the office of the President as Acting President until the President transmits a letter to the President of the Senate and Speaker of the House of Representatives that he is now available to resume his functions as President.
Credit: Policy and Legal Advocacy Centre (PLAC)