Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 160, § 133A

Every railroad corporation shall equip with proper lights or other approved or commonly used devices all switch stands in all yards owned and maintained by such railroad corporation in which trains or switching engines are generally operated during the hours of darkness, except at locations where, and so long as, it is specially exempted from so doing by the department. The provisions of this section shall not be applicable to switch stands or switches located in interlocking signal, automatic block signal or centralized traffic control territory. A railroad corporation which unreasonably neglects to comply with this section shall, for every such neglect, be punished by a fine of five dollars.