Pub. L. 82-476, pt. II, ch. 2, sec. 222

Sec. 222. (a) To become an officer of a reserve component an individual shall be appointed as a Reserve commissioned officer or Reserve warrant officer of an Armed Force of the United States in a grade corresponding to one of the grades of the Regular component of that Armed Force of the United States and subscribe to the oath prescribed by section 1757 of the Revised Statutes, as amended (5 U. S. C. 16): Provided. That no person shall become a member of the National Guard of the United States or Air National Guard of the United States in a commissioned officer or warrant officer grade, hereunder, unless he first be appointed to and federally recognized in the same commissioned or warrant officer grade in the National Guard or Air National Guard in the appropriate State, Territory, or the District of Columbia and subscribe to the oath provided in section 73 of the National Defense Act, as amended. (b) Each person appointed in a commissioned officer grade as a Reserve in an Armed Force of the United States shall be commissioned as a Reserve officer in the Army of the United States, the United States Navy, the United States Marine Corps, the United States Air Force, or the United States Coast Guard, as appropriate.