To be effective, inspectors need to be able to freely go into any workplace and look at what is, or has been, happening there.

Therefore the Act authorises them to:

• Enter workplaces at any reasonable time
• Conduct examinators, tests, inquiries, and inspections
• Bring with them other people with relevant expertise
• Take photographs and measurements
• Sketch or record things
• Require the workplace to be left undisturbed
• Require the production of documents
• Ask for statements to be made
• Take samples.

If the workplace is in or through a home then entry is only possible if the inspector gets the permission of the owner or, failing that, gets a warrant from a Judge.