Airspace change proposal – Lowering Class E airspace for continental Australia

Closed 23 Jun 2019

Opened 21 May 2019


The Office of Airspace Regulation (OAR) within CASA is currently assessing an airspace change proposal (ACP) made by Airservices Australia to lower Class E airspace from Flight Level (FL) 180 to FL 125 nationally (where the current base is FL180). Airservices Australia is proposing the change as part of its airspace modernisation program to standardise its approach to airspace management.

This consultation makes reference to the ‘J Curve,’ which is the name given to describe the high traffic density area extending from Cairns down to Melbourne, and around to Adelaide.

The OAR manages the regulation of airspace in Australia and given the nature and magnitude of the proposed change is seeking industry feedback to inform its assessment and response to the proposal.

Further information about airspace regulation and the airspace change process is available on the CASA website.

Why We Are Consulting

We are seeking industry feedback to understand the impact of the proposal on current and future airspace users and the impact it could have on safety and operational efficiency.

Please note: Airservices Australia is also seeking feedback on similar initiatives under Tranche 3 of the airspace modernisation project. This proposal is a separate initiative.

Documents for review

A copy of the fact sheet Standardisation of Class E Airspace developed by Airservices is provided below (See Related).

We have also provided a downloadable Word copy and PDF of this consultation for ease of distribution and feedback within your organisation. However, please use the online consultation form to submit your final response. The word document and PDF should not be used as an emailed submission.

What Happens Next

Once the consultation has closed, we will register and review each submission received through the online response form. We will make all submissions publicly available on the Consultation Hub, unless you request that your submission remain confidential. We will also publish a Summary of Consultation which summarises the feedback received.

The OAR will use feedback received via this consultation to inform its decision on whether to approve the airspace change proposal.

Information about how we consult and how to make a confidential submission is available on the CASA website.

To be notified of any future consultations, you can subscribe to our consultation and rulemaking mailing list.


  • CASA Staff
  • Aerodrome operators
  • Air operators
  • Instructors and flight examiners
  • Flight training organisations
  • Pilots
  • Air traffic controller
  • Air traffic service providers


  • Airspace and infrastructure