Section 831.2402 - Allowable service(a) Service credit deposits are not allowed for training periods prior to actual enrollment.(b) Service credit deposits can only be made for satisfactory volunteer and volunteer leader service.(c) Annuitants enrolling as a volunteer or volunteer leader are not deemed reemployed annuitants. Service as a volunteer or volunteer leader performed after retiring under a CSRS or FERS retirement is not creditable service for retirement purposes.