You may require an Offshore Project Proposal (OPP) if you intend to undertake a new offshore petroleum development project in Commonwealth waters (i.e. Australian waters outside the state and territory 3 mile boundary).
An offshore project is one or more petroleum activities that are undertaken for the purpose of the recovery of petroleum, other than on an appraisal basis.
Please note, if your OPP is approved, you will still need to have an Environmental Plan approved by the agency before you can undertake the related activity.