Prior to the establishment of the ICAO USAP, a number of ‘technical evaluations’ were conducted in States on a voluntary basis in order to assess compliance with the Standards of Annex 17 and to provide advice on any necessary improvements. These evaluations revealed that there was a significant shortfall in compliance worldwide. With increased concern over the level of aviation security worldwide after the events of 11 September 2001, a need was identified to reduce all acts of unlawful interference and to restore public confidence in civil air transport. The USAP was created in order to respond to this need.
 
 
Details regarding the background and future evolution of the USAP can be found by following these links: