per AIR FORCE INSTRUCTION 36-2006, the person appointing the oath must be active or retired.
3. Administering the Oath. Persons being appointed or commissioned in the Air Force may take the oath before a:
3.1. Civil official authorized by law to administer oaths.
3.2. Commissioned officer of any component of any Armed Force of the United States (includes Reserve components), whether on active duty or retired. (This includes commissioned warrant officers of the Army, Navy, Marine Corps, and Coast Guard.)
3.3. Warrant officer serving on active duty as an adjutant, assistant adjutant, acting adjutant, or personnel adjutant of a command.