Pub. L. 83-773, tit. V, sec. 520

Sec. 520. (a) An officer of the Air National Guard of the United States in the grade of second lieutenant who is appointed in or promoted to the grade of first lieutenant by the Governor or other appropriate authority to fill an authorized vacancy in the Air National Guard of a State, a Territory, or the District of Columbia, shall be extended Federal recognition, without the examination prescribed in section 75 of the National Defense Act, as amended, in the grade of first lieutenant and promoted effective on the date upon which he completes three years of promotion service in grade. (b) Subject to section 204 of this Act, and notwithstanding any other law, an officer of the Air National Guard of the United States in the grade of second lieutenant who is not appointed in or promoted to the grade of first lieutenant by the Governor or other appropriate authority of a State, a Territory, or the District of Columbia, shall, within ninety days after he completes three years of promotion service in the grade of second lieutenant, be discharged.