active duty
(1) The term “active duty” means— (A) full-time duty in the Armed Forces, other than active duty for training; (B) full-time duty (other than for training purposes) as a commissioned officer of the Regular or Reserve Corps of the Public Health Service; (C) full-time duty as a commissioned officer of the National Oceanic and Atmospheric Administration; and (D) full-time duty as a cadet or midshipman at the United States Military Academy, United States Naval Academy, United States Air Force Academy, or the United States Coast Guard Academy.