Airport security represents the number one operating cost within the airport industry, and new security requirements can emerge with little warning due to evolving or changing threats to civil aviation. ACI EUROPE works closely with regulators to determine the most appropriate measures to mitigate any new threats, but inevitably this can introduce additional complexity for both passengers and security staff alike. The travelling public expects a secure environment, and to experience a smooth and efficient process that delivers this security. ACI EUROPE promotes a regulatory approach that focuses on a harmonisation of rules, an integration of more advanced technologies, sustainable funding, a better passenger experience, and a structured approach to unforeseen new security requirements.