(a) If warranted by the conduct of the parolee and the ends of justice, the Board may terminate the period of parole supervision and discharge the parolee from parole supervision. Supervision of a parolee serving a life sentence may be terminated only after 15 years measured from the date of first confinement.
(b) The Board shall discharge the parolee at the expiration of the maximum term of his or her sentence.
(c) [Repealed.]