Mass. Gen. Laws ch. 127 § 86G
In Suffolk county the penal institutions commissioner of Boston shall have the same powers and duties with respect to the house of correction at Deer Island, and the sheriff of Suffolk county shall have the same powers and duties with respect to the Suffolk County Jail, as are vested in the sheriff of any county, except the sheriff of Suffolk county, under the provisions of section eighty-six F, and the exercise of such powers and duties, in each instance, shall be subject to the same terms and conditions as are provided in said section eighty-six F. The work release supervisor or supervisors in Suffolk county shall be placed in such grade of the classification and pay plan for said county as the city council of the city of Boston, subject to the provisions of the charter of said city, shall from time to time determine.
Mass. Gen. Laws ch. 127, § 86G