Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 166, § 21F

(a) Series of poles or the equivalent;

(b) Nonconductive enclosures around conductors.

“De-energizing” shall mean removing the voltage from electrical conductors.

“Temporary relocation” shall mean:

(a) Removing electrical conductors from poles;

(b) Elevating electrical conductors from poles;

(c) Rerouting electrical conductors.

“Authorized person” shall mean:

(a) Employees of a light and power company with respect to the electrical system of such a company, and the employees of a transportation system with respect to the electrical circuits of such system;

(b) Employees of communication utilities, state, county or municipal agencies having authorized circuit construction on the poles or structures of an electric power company or transportation system or communication system;

(c) Employees of an industrial plant with respect to the electrical system of such plant;

(d) Employees of any electrical or communications contractor with respect to work under his supervision.

“Warning sign” shall mean a weather resistant sign of not less than five inches by seven inches with a yellow background and black lettering reading as follows: “WARNING--Unlawful to operate this equipment within SIX FEET of high voltage lines.”