Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 120, § 6

(a) Permit him his liberty under supervision and upon such conditions as it believes conducive to law-abiding conduct; or--

(b) Order his confinement under such conditions as it believes best designed for the protection of the public; or--

(c) Order reconfinement or renewed release as often as conditions indicate to be desirable; or--

(d) Revoke or modify any order, except an order of final discharge, as often as conditions indicate to be desirable; or--

(e) Discharge him from control with notice to the court, except as provided in section twelve, when it is satisfied that such discharge is consistent with the protection of the public.