10 U.S.C. § 14506

Unless retained as provided in section 12646, 12686, 14701, 14701a, or 14702 of this title, each reserve officer of the Army, Navy, Air Force, or Marine Corps who holds the grade of major or lieutenant commander who has failed of selection to the next higher grade for the second time and whose name is not on a list of officers recommended for promotion to the next higher grade shall, if not earlier removed from the reserve active-status list, be removed from that list in accordance with section 14513 of this title on the later of (1) the first day of the month after the month in which the officer completes 20 years of commissioned service, or (2) the first day of the seventh month after the month in which the Secretary concerned releases the promotion results of the board which considered the officer for the second time to the public.