You must notify the responsible Agency in writing at least three days before undertaking construction excavation work on a shaft, trench or tunnel. This applies to any construction excavation work that:
- is of sufficient depth or dimensions for a person to enter
- the work involves a risk to the health or safety of any person.
This notification does not apply to excavation of a shaft or trench made as part of building work which is authorised by a valid building permit. It also does not apply to a mine, bore, quarry or burials.