On June 12, 2012, the Ontario government filed two regulations under the Occupational Health and Safety Act.

O. Reg. 148/12 (Designated Substances) adds  “or to a physician designated by the Provincial Physician” to subsections 30(2) and 31(2) of O. Reg. 490/09, effective immediately. It further substitutes a new Table 1 (Exposure Limits) prescribing Agents and corresponding Time-Weighted Average Limit (“TWA”), Short-Term Exposure Limit (“STEL”), Ceiling Limit (“C”) and Notations. The amendments will come into force on January 1, 2013. The new Table will come into force January 1, 2013.

O. Reg. 149/12 (Control of Exposure to Biological or Chemical Agents) amends Regulation 833 of R.R.O. 1990 by substituting a new definition for “ACGIH Table” in section 1, and substitutes a new Table 1 (Ontario Table of Occupational Exposure Limits) prescribing Agents and corresponding Time-Weighted Average Limit (“TWA”), Short-Term Exposure Limit (“STEL”), Ceiling Limit (“C”) and Notations. The amendments will come into force on January 1, 2013.