 Section 3 says when a president says to the head of the Senate and the Speaker of the House, written declaration that he is unable to discharge the powers and duties of office, and until he transmits to them a written declaration to the contrary, such powers and duties shall be discharged by the vice president. In other words, he'd have to say himself, I'm out of here, and she goes. Section 4, whenever the VP and a majority of either the principal officers of the executive department, so that's the cabinet,