Chapter 23. Personnel; Enlisted 14 U.S. Code §2301. Recruiting campaigns 14 U.S. Code §2302. Enlistments; term, grade 14 U.S. Code §2303. Promotion 14 U.S. Code §2304. Compulsory retirement at age of sixty-two 14 U.S. Code §2305. Voluntary retirement after thirty years' service 14 U.S. Code §2306. Voluntary retirement after twenty years' service 14 U.S. Code §2307. Retirement of enlisted members: increase in retired pay 14 U.S. Code §2308. Recall to active duty during war or national emergency 14 U.S. Code §2309. Recall to active duty with consent of member 14 U.S. Code §2310. Relief of retired enlisted member promoted while on active duty 14 U.S. Code §2311. Retirement in cases where higher grade or rating has been held 14 U.S. Code §2312. Extension of enlistments 14 U.S. Code §2313. Retention beyond term of enlistment in case of disability 14 U.S. Code §2314. Detention beyond term of enlistment 14 U.S. Code §2315. Inclusion of certain conditions in enlistment contract 14 U.S. Code §2316. Discharge within three months before expiration of enlistment 14 U.S. Code §2317. Aviation cadets; procurement; transfer 14 U.S. Code §2318. Aviation cadets; benefits 14 U.S. Code §2319. Critical skill training bonus