(a) Except an officer of the Navy and Marine Corps who is an officer designated for limited duty (to whom section 8146(e) or 8372 of this title applies), each officer of the Army, Air Force, or Marine Corps on the active-duty list who holds the grade of first lieutenant and has failed of selection for promotion to the grade of captain for the second time, and each officer of the Navy on the active-duty list who holds the grade of lieutenant (junior grade) and has failed of selection for promotion to the grade of lieutenant for the second time, whose name is not on a list of officers recommended for promotion to the next higher grade shall—

(1) be discharged on the date requested by him and approved by the Secretary of the military department concerned, which date shall be not later than the first day of the seventh calendar month beginning after the month in which the President approves the report of the board which considered him for the second time;

(2) if he is eligible for retirement under any provision of law, be retired under that law on the date requested by him and approved by the Secretary concerned, which date shall be not later than the first day of the seventh calendar month beginning after the month in which the President approves the report of the board which considered him for the second time; or

(3) if on the date on which he is to be discharged under paragraph (1) he is within two years of qualifying for retirement under section 7311, 8323, or 9311 of this title, be retained on active duty until he is qualified for retirement and then be retired under that section, unless he is sooner retired or discharged under another provision of law.

(b) The retirement or discharge of an officer pursuant to this section shall be considered to be an involuntary retirement or discharge for purposes of any other provision of law.

(c) An officer who is subject to discharge under subsection (a)(1) is not eligible for further consideration for promotion.

(d) For the purposes of this chapter, an officer of the Army, Air Force, or Marine Corps who holds the grade of first lieutenant, and an officer of the Navy who holds the grade of lieutenant (junior grade), shall be treated as having failed of selection for promotion if the Secretary of the military department concerned determines that the officer would be eligible for consideration for promotion to the next higher grade by a selection board convened under section 611(a) of this title if such a board were convened but is not fully qualified for promotion when recommending for promotion under section 624(a)(3) of this title all fully qualified officers of the officer's armed force in such grade who would be eligible for such consideration.