651. Places where explosive atmospheres may occur.

Subject to transitional provisions1, every employer2 must classify places at the workplace3 where an explosive atmosphere4 may occur into hazardous5 or non-hazardous places in accordance with the statutory requirements6 and must classify those places so classified as hazardous into zones7.

The employer must ensure that the specified requirements8 are applied to equipment and protective systems in the places so classified as hazardous9.

Where necessary, places so classified as hazardous must be marked by the employer with signs