342.11(1)An employer shall ensure that a laboratory fume hood installed on or after the commencement of this section is selected, used, tested and maintained in accordance with CSA Standard Z316.5:20 “Fume hoods and associated exhaust systems” or a standard offering equivalent or better protection.

342.11(2)An employer shall ensure that a laboratory fume hood installed before the commencement of this section meets the requirements of Clause 10.3 of CSA Standard Z316.5:20 “Fume hoods and associated exhaust systems” or a standard offering equivalent or better protection.