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https://infrastructure.gov.au/aviati...national/icao/
Standards and Recommended Practices (SARPs)
The Chicago Convention provides (Article 37) for the Council of ICAO to make standards and recommended practices dealing with a wide range of matters concerned with the safety, regularity and efficiency of air navigation. The current standards and recommended practices are published by ICAO as Annexes to the Chicago Convention. This list also shows the agency responsible for each Annex.
More information about Annexes is available from the ICAO website. Copies of the annexes are available from ICAO or they may be accessed at major libraries. Annexes may also be inspected at the Library of the Department of Infrastructure and Regional Development, Canberra telephone (02) 6274 7641 (business hours).
Notification of Differences to Standards and Recommended Practices
Article 38 of the Convention requires, where a State finds it impracticable to comply in all respects with a standard, or to bring its own regulations or practices into full accord with a standard, that notification be given to ICAO.
Such notification is referred to as a “difference” and is published by ICAO in Supplements to each Annex.
Contracting States are also required by Annex 15 to publish their differences in their Aeronautical Information Publication (AIP). The Australian AIP is published by Airservices Australia.