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MHI assessment and registration

Find out how to determine if your workplace is a Major Hazard Installation (MHI) and how to register to be one.

At a glance

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How to determine

To determine if your workplace is an MHI, you can:

Where necessary, refer to the reference list of common dangerous substances hazard classification for additional information on the classification of the dangerous substances.

How to register

If your workplace is assessed to be an MHI, you need to apply for or renew your Certificate of MHI registration.

For new MHIs

You need to submit your safety case to MHD at least 6 months before starting operations:

  1. Download and complete the MHI assessment form.
  2. Apply for Factory Notification or Registration to get your Certificate of MHI Registration.

For existing MHIs

You need to renew your Certificate of MHI Registration at least 6 months before its expiry:

  1. Download and complete the MHI assessment form.
  2. Renew your Factory Registration to renew your Certificate of MHI Registration.
Last Updated: 25 September 2017