Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 164, § 114

Meters in use shall be tested by the department, on the request of the consumer or of the gas company, in the presence of the consumer if desired, and with sealed apparatus. If it finds that the meter is correct, the person requesting the inspection shall pay the fees for such inspection and the expense of removing the meter for the purpose of being tested, and the reinspection shall be stamped on the meter. If it finds that the meter is incorrect, the gas company shall pay such expenses and shall furnish a new meter without charge to the consumer.