PREAMBLE

lock-out / tag-outs. The supervisor shall ensure that the necessary tags, locks and lock-out are provided in the necessary quantities maintained in good working order.

http://algonquincollege.com/physical_resources/Document%20Inserts/Occupational%20Health%20and%20Safety%20Standards/Standards/OHS%20WP-12%20Lock-out%20Tag-out.pdf