Mass. Gen. Laws ch. 127, § 37: Record of visitors

Section 37. The superintendent of each correctional institution shall cause a record to be kept of the names and residences of all visitors, which record shall always be open to the commissioner, and may refuse admission to a person having a permit if in his opinion such admission would be injurious to the best interests of the institution, but such superintendent shall forthwith report such refusal to the commissioner.