Declaring the President unable to serve
Official text rightpowerlimitif conditionlegal term
Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office, the Vice President shall immediately assume the powers and duties of the office as Acting President.
Thereafter, when the President transmits to the President of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office unless the Vice President and a majority of either the principal officers of the executive department or of such other body as Congress may by law provide, transmit within four days to the President of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office. Thereupon Congress shall decide the issue, assembling within forty-eight hours for that purpose if not in session. If the Congress, within twenty-one days after receipt of the latter written declaration, or, if Congress is not in session, within twenty-one days after Congress is required to assemble, determines by two-thirds vote of both Houses that the President is unable to discharge the powers and duties of his office, the Vice President shall continue to discharge the same as Acting President; otherwise, the President shall resume the powers and duties of his office.
Proposal and ratification: This amendment was proposed by the Eighty-ninth Congress by Senate Joint Resolution No. 1, which was approved by the Senate on February 19, 1965, and by the House of Representatives, in amended form, on April 13, 1965. The House of Representatives agreed to a Conference Report on June 30, 1965, and the Senate agreed to the Conference Report on July 6, 1965. It was declared by the Administrator of General Services, on February 23, 1967, to have been ratified by the legislatures of 39 of the 50 States. was completed on February 10, 1967.
Simplified explanation
If the Vice President and a majority of the principal officers of the executive departments (or another body Congress provides) declare in writing that the President is unable to serve, the Vice President becomes Acting President. Disputes are decided by Congress by two-thirds vote of both Houses.