Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 100A, § 12

(a) Upon request of a consumer, a registered motor vehicle glass repair shop shall disclose all information relating to the charges for repair or replacement services, including the amount of the charges, the identification and line item charges for the parts provided and verification of the parts used, regardless of whether the amount is paid by the consumer or billed to the consumer's insurance company.

(b) A motor vehicle glass repair shop shall advise the consumer of post-repair practices that may be necessary to insure safe operation of the vehicle.