Full-time service in the armed forces (other than active duty for training), full-time duty (other than for training purposes) as a commissioned officer of the regular or reserve corps of the Public Health Service, full-time duty as a commissioned officer of the National Oceanic and Atmospheric Administration, and service at any time as a cadet at the United States Military, Air Force, or Coast Guard academies or as a midshipman at the United States Naval Academy.

