The Airspace branch of the division is referred to as the Office of Airspace Regulation (OAR).
The OAR exercises powers under the Airspace Regulations (2007) to regulate and administer Australian airspace, including prohibited, restricted and danger areas, where certain types of activities take place that may present a risk to aviation activities. Australian airspace administration is generally aligned with ICAO airspace classes and associated air traffic services Airservices Australia and the Department of Defence provide those air traffic services. More information about the classes of airspace and airspace management is available from Airservices Australia. The OAR also provides a regulatory function for the published air routes.
The OAR is divided into two teams: airspace reform and airspace operations. The airspace reform team reviews the airspace architecture and recommends changes as appropriate whereas the airspace operations team focus is on the day to day airspace change needs as well as the implementation of permanent changes to the airspace architecture.
Any changes to the Australian airspace or the air routes are considered by the OAR through the airspace change process. Any changes to the airspace architecture will be undertaken in accordance with the airspace principles that are promulgated in the OAR operations manual.
The permanent airspace architecture is legislated biannually. The registered legislative instruments made are lodged on the Federal Register of Legislation. The non-legislative instruments made can be requested by contacting the OAR.