8.40 Respirator Fit test
(1) A respirator which requires an effective seal with the face for proper functioning must not be issued to a worker unless a fit test demonstrates that the face piece forms an effective seal with the wearer’s face.
(2) Fit tests must be performed in accordance with procedures in CSA Standard CAN/CSA-Z94.4-02, Selection, Use, and Care of Respirators.
(2.1) A fit test must be carried out
(a) before initial use of a respirator,
(b) at least once a year,