Section four of the Twenty-fifth Amendment to the Constitution of the United States (PDF) states the following:

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 pro tempore 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 pro tempore 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 pro tempore 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.

On January 6 2021, Trump supporters stormed the United States Capitol following a rally held by President Trump in which he refused to accept defeat in the 2020 presidential election.

The scale of the disorder has led some to propose that Trump be promptly removed from office before Biden is inaugurated.

Will President Trump be relieved of his duties under section four of the Twenty-fifth Amendment before inauguration day?

For a positive resolution, before January 20, 2021 it must be announced by the White House or reported by the New York Times or Washington Post that President Trump has been relieved of his duties as president and the vice president has become Acting President under the terms of section four of the Twenty-fifth Amendment.

A removal from office of any other sort, or a transfer of power under any other section of the Twenty-fifth Amendment, or any transfer of power not expressly made in accordance with the provisions of the Constitution, does not count for this question.