Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 166, § 36

A corporation or person maintaining or operating telephone, telegraph, television or other electric wires shall, at all places where such wires are affixed by any pole, structure or fixture to the property of another, mark such pole, structure or fixture in a clear, durable and legible manner with the name or initials of the corporation or person maintaining or operating such wires, and any corporation or person failing to comply with this section shall be punished by a fine of not more than one hundred dollars.