Active duty.
Active duty. Full-time duty in the active military service of the United States. This includes full-time training duty; annual training duty; and attendance, while in the active military service, at a school designated as a service school by law or by the Secretary of the military department concerned. It does not include full-time National Guard duty.
Source
32 CFR § 728.2
Scoping language
Unless otherwise qualified in this part, the following terms, when used throughout, are defined as follows: