32 C.F.R. § 571.4 Periods of enlistment.
Title 32 - National Defense
Enlistments are authorized for periods of 2, 3, 4, 5, or 6 years. The enlistee's option determines the number of years.
Title 32: National Defense
PART 571—RECRUITING AND ENLISTMENTS
§ 571.4 Periods of enlistment.