Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 99, § 4

The deputy director of standards may verify, adjust and seal all metric weights and measures brought to him for that purpose. The sealer of weights and measures in each town which has received the standard metric weights and measures shall verify, adjust and seal all metric weights and measures brought to him for that purpose from within the county where such town is situated, and he shall receive a reasonable compensation therefor; but he shall claim no fees for any sealing, verification or adjustment for the performance of which he may otherwise receive compensation by salary paid by the town.