The authorities are rightly tightening requirements for fit testing of masks used as protection from inhaling silica dust particles (found in rocks, sand, clay, cement and many other widely used products on a construction site).
Moving forward a fit test will be required on first use of a safety mask. This fit test must be completed by a suitably qualified person and it is the workers responsibility to ensure they maintain the proper fit (eg no facial hair impeding the fit of the mask).
See the Workcover QLD information page on silicia dust for further information.