Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 2, § 5

The state secretary shall be the custodian of the coat of arms, seal and flags of the commonwealth and all representations of said arms, seal and flags shall conform strictly to the specifications which shall be prepared under the direction of the state secretary in the year nineteen hundred and seventy-one and deposited in his office. The proper use and display of said arms, seal and flags of the commonwealth and their manufacture are hereby subject to such regulations relating thereto which the state secretary may from time to time issue, provided that such regulations shall be in conformity with all the relevant legislation of the United States and of the commonwealth.