Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 159B, § 16A

The department, in the enforcement of this chapter, may inspect or cause to be produced the books and records of persons engaged in the business of leasing trucks and motor vehicles, or either, for the transportation of property for hire, and may compel such persons to furnish such information as the department may find necessary relative to the identity of the lessee, or the use to which any such truck or motor vehicle is to be put, or both. Nothing in this section shall be deemed to diminish the powers conferred on the director of the commercial motor vehicle division of the department by section twelve G of chapter twenty-five.