Mass. Gen. Laws ch. 190B § 5-425
Subject to the restrictions in section 5-407(c), the court may confer on a conservator at the time of appointment or later, in addition to the powers conferred by sections 5-423 and 5-424, any power that the court itself could exercise under sections 5-407(c) and 5-407(d). The court, at the time of appointment or later, may limit the powers of a conservator otherwise conferred by sections 5-423 and 5-424 or previously conferred by the court and may at any time remove or modify any limitation. If the court limits any power conferred on the conservator by section 5-423 or section 5-424, or specifies, as provided in section 5-419(a), that title to some but not all assets of the protected person vest in the conservator, the limitation or specification of assets subject to the conservatorship shall be endorsed upon the letters of appointment.
Mass. Gen. Laws ch. 190B, § 5-425