The ICAO Regional Office for Europe and North Atlantic (ICAO EUR/NAT), organized in Paris from 28 to 29 of January 2025, a USOAP Workshop (WS) to support the Member States (MS) to be audited by ICAO within the year 2025. In that context, the Regional Office invited HCAA on January 28, to present to the participants, through the National Continuous Monitoring Coordinator (NCMC), Mr. Konstantinos Karageorgis, the preparation plan during the period before the USOAP CMA Audit that was conducted in Greece by ICAO in December 2023, to the benefit of the other MS through the dissemination of best practices.