On April 1, 2012, certain provisions under the Ontario Occupational Health and Safety Statute Law Amendment Act, 2011 (formerly Bill 160) came into force, including the prevention mandate in Ontario and Joint Health and Safety Committee certification training. The responsibility for the prevention mandate and the JHSC certification training were transferred from the Workplace Safety and Insurance Board to the chief prevention officer at the Ministry of Labour.
The Ontario Legislative Assembly passed Bill 160, the Occupational Health and Safety Statute Law Amendment Act, 2011 by a vote of 79–0. Most provisions of the Bill will take effect when it receives royal assent sometime in June. However, some sections will take effect on either April 1, 2012, or a date set by the lieutenant-governor, whichever is earlier.