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CASR Part 91 - General operating and flight rules

Part 91 of the Civil Aviation Safety Regulations 1998 (CASR) and its associated manual of standards (MOS) consolidates the general operating and flight rules for Australian aircraft.

Who Part 91 affects

Part 91 is the foundation for all aviation operations.

These are the rules of the air for pilots who are not operating under an Air Operator’s Certificate (AOC) or other certificate.

If you are conducting an operation to which another CASR Part applies, then that part may add to or turn off some Part 91 requirements – either completely or partially.

    Open projects

    Projects are opened to revise a CASR Part.

    Part 91 open projects include:

    Project OS 99/08 is part of a group of CASA projects associated with the flight operations regulations.

    Consultation and project activities

    Read the CASR Part 91 project and consultation activities.

    Legislation

    Current rules in effect for Part 91 include:

    Advisory documents

    Advisory circulars (ACs) provide advice and guidance to explain particular regulatory requirements of a CASR Part.

    Part 91 AC documents can be found in the table below.

    Reference Subject Date
    AC 21-45(1) Airworthiness Approval of Airborne Automatic Dependent Surveillance - Broadcast Equipment February 2013
    AC 21-36(1) Global Navigation Satellite System (GNSS) Equipment: Airworthiness Guidelines January 2013
    AC 91.U-01 Navigation Authorisations December 2014
    AC 91.U-04 v1.0 Airworthiness requirements for performance based navigation February 2015
    AC 91.U-II-C-6(0) Navigation Authorisations – RNP AR Operations September 2012
    AC 91.U-2(0) Required Navigation Performance 10 (RNP 10) Operational Authorisation November 2005
    AC 91U-3(0) Required Navigation Performance 4 (RNP 4) Operational Authorisation November 2005