Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 149, § 47

Whoever, except at the request of the employee, requires an employee engaged in any commercial occupation or in the work of any industrial process not subject to the following section or in the work of transportation or communication to do on Sunday the usual work of his occupation, unless he is allowed during the six days next ensuing twenty-four consecutive hours without labor, shall be punished by a fine of not more then three hundred dollars; but this and the following section shall not be construed as allowing any work on Sunday not otherwise authorized by law.