10 U.S.C. § 1208: Computation of service

The service that he is considered to have for the purpose of separation, discharge, or retirement for length of service. his active service as a member of the armed forces, a nurse, a reserve nurse, a contract surgeon, a contract dental surgeon, or an acting dental surgeon; his active service as a member of the National Oceanic and Atmospheric Administration or the Public Health Service; and his service while participating in exercises or performing duties under sections 502, 503, 504, and 505 of title 32. A member of the armed forces who is not a member of a regular component shall be credited, for the purposes of this chapter, with the number of years of service that he would count if he were computing his years of service under section 12733 of this title . a cadet at the United States Military Academy, if appointed before August 24, 1912 ; a midshipman at the United States Naval Academy, if appointed before March 4, 1913 ; an Army field clerk; and a field clerk, Army Quartermaster Corps.”