 EUROCAE documents are widely referenced by the International Civil Aviation Organisation (ICAO) as Guidance Material and by the European Aviation Safety Agency (EASA) as means of compliance to European Technical Standard Orders (ETSOs) and other regulatory documents.To achieve the desired global harmonisation of aviation standards, EUROCAE has a close cooperation with RTCA, Inc. and SAE International.About 50% of the EUROCAE Working Groups (WG) work jointly with RTCA, and another 10% with SAE.