Chap. 570. An Act further regulating the inspection of refrigeration AND AIR CONDITIONING SYSTEMS BY THE DIVISION OF INSPECTION OF THE DEPARTMENT OF PUBLIC SAFETY.
Be it enacted, etc., as follows:
Chapter 146 of the General Laws is hereby amended by striking out section 45A, as most recently amended by chapter 655 of the acts of 1963, and inserting in place thereof the following section: —
Section I±5A. No person shall operate or cause to be operated a refrigeration or air conditioning system, or any appurtenance thereof, excepting refrigeration or air conditioning systems in railway trains, motor vehicles, private residences, apartment houses of less than five apartments, and refrigeration and air conditioning systems located on property under the jurisdiction of the United States government, refrigeration and air conditioning systems used exclusively for agricultural, horticultural or floricultural purposes, and refrigeration and air conditioning systems having less than twenty tons capacity, unless such system has been inspected by the division and a certificate of inspection issued therefor, or unless such system is insured by and subject to periodical inspection by a company authorized to insure pressure vessels in the commonwealth and a certificate of inspection has been issued therefor. All refrigeration and air conditioning systems requiring a certificate from the division shall be inspected at least once a year. Whoever owns or uses or causes to be used a refrigeration or air conditioning system requiring certification by the division shall, unless such