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.
6. The President shall, at stated times, receive for his services, a
compensation, which shall neither be increased nor diminished during the
period for which he shall have been elected, and he shall not receive
within that period any other emolument from the United States, or any of
them.