The board shall:
I. Be responsible for paroling prisoners from the state prison and recommitting those who have violated the conditions of parole, subject to the applicable provisions of this chapter;
II. Have legal custody of all persons released on parole until they receive their discharge or are recommitted to the prison;
III. Adopt rules, pursuant to RSA 541-A, relative to:
(a) The parole process, including the conduct of parole hearings;
(b) Criteria used to evaluate prospective parolees;
(c) Conditions for the conduct of parolees; and
(d) Procedures for revocation of parole.
(e) Procedures for medical parole.