10 U.S.C. § 509
Section 509 · Voluntary extension of enlistments: periods and benefits
Amended 1 time on record
Applied in 1 court decisions — leading case Johnson v. Chafee (1972)
Most recently applied in Johnson v. Chafee (November 1972)
How often courts cite this section
Court decisions citing this, by year.Markers show enactment, consequential amendments, and circuit splits over this section — watch for a citation surge after a change or a disagreement. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
(a) Under such regulations as the Secretary concerned may prescribe, the term of enlistment of a member of an armed force may be extended or reextended with his written consent for any period. However, the total of all such extensions of an enlistment may not exceed four years.
(b) When a member is discharged from an enlistment that has been extended under this section, he has the same rights, privileges, and benefits that he would have if discharged at the same time from an enlistment not so extended.