Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 147, § 31

The clerk of each town in which a chief of police or city marshal is appointed shall, within one week after such appointment, notify the executive director of the municipal police training committee of the name of the person so appointed; and the clerk of each town not having a chief of police shall annually, on October first, send to the executive director of the municipal police training committee the names of all the police officers and constables in such town. If he neglects or refuses so to do, he shall be punished by a fine of fifty dollars.