Workplace Health & Safety Regulations require an Asbestos Clearance Certificate when asbestos is removed from a demolition site. If the amount of asbestos removed is 10 square meters or more, then a certificate momst likely required.
The purpose of the Asbestos Clearance Certificate is to ensure that all visible asbestos fragments posing a significant health risk have been removed, this also includes the transit routes to and from the removal area. A visual inspection is one method to verify that the asbestos has been removed from the area.