((a)) ** .—** If an officer of the Army National Guard of the United States or the Air National Guard of the United States has been absent without leave for three months, the Secretary of the Army or the Secretary of the Air Force, as appropriate, may—
((1)) terminate the reserve appointment of the officer; and
((2)) withdraw the officer’s Federal recognition as an officer of the National Guard.
((b)) ** .—** An officer of the Army National Guard of the United States or the Air National Guard of the United States whose Federal recognition as an officer of the National Guard is withdrawn under shall be discharged from the officer’s appointment as a reserve officer of the Army or the Air Force, as the case may be.