U.S. Constitution, Twentieth Amendment, Section 4
The Congress may by law provide for the case of the death of any of the persons from whom the House of Representatives may choose a President whenever the right of choice shall have devolved upon them, and for the case of the death of any of the persons from whom the Senate may choose a Vice President whenever the right of choice shall have devolved upon them.
Notes
Allows Congress to provide by law for the case of the death of any of the persons from whom the House of Representatives may choose a President, or from whom the Senate may choose a Vice President, whenever the right of choice has devolved upon them.
Use as reference
Lexinter.net | U.S. Const. amend. XX, § 4 | https://laws.lexinter.net/constitution/us/amendment-20/section-4