Whenever it appears to the board that a person on parole is no longer in need of supervision, it may order the warden of the institution from which the parolee was released to issue the parolee a certificate of discharge, except in the case of persons serving a life sentence who may not be discharged from parole in less than 10 years after release on parole.   [PL 2013, c. 508, §13 (AMD).]