No mention in Art 7 Sec 11.
Art VII - Section 11. Whenever the President transmits to the President of the Senate and the Speaker of the House of Representatives his written declaration that he is unable to discharge the powers and duties of his office, and until he transmits to them a written declaration to the contrary, such powers and duties shall be discharged by the Vice-President as Acting President.
Whenever a majority of all the Members of the Cabinet transmit to the President of the Senate and to 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 to the Speaker of the House of Representatives his written declaration that no inability exists, he shall reassume the powers and duties of his office. Meanwhile, should a majority of all the Members of the Cabinet transmit within five days to the President of the Senate and to 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 Congress shall decide the issue. For that purpose, the Congress shall convene, if it is not in session, within forty-eight hours, in accordance with its rules and without need of call.
If the Congress, within ten days after receipt of the last written declaration, or, if not in session, within twelve days after it is required to assemble, determines by a two-thirds vote of both Houses, voting separately, that the President is unable to discharge the powers and duties of his office, the Vice-President shall act as President; otherwise, the President shall continue exercising the powers and duties of his office.