4. The design, manufacture, testing, inspection and registration of pressure vessels, with the exception of refrigeration systems and pressure vessels destined for use in the nuclear energy sector shall conform to the Boiler, Pressure Vessel, and Pressure Piping Code (CSA B51-M1991), published by CSA.
O.C. 2519-82, s. 4; O.C. 1310-91, s. 3; O.C. 1678-94, s. 2.