The manual was groundbreaking for its time in addressing elevated-risk scenarios. It outlines specific security checks to be implemented "when there is an indication that an aircraft is at an elevated risk". More notably, ICAO Doc 9811 (2002) is one of the few ICAO documents that explicitly addresses the threat of devices.
To provide guidance on implementing the security-related Standards and Recommended Practices (SARPs) found in Annex 6 ( Operation of Aircraft ) to the Chicago Convention. icao doc 9811 pdf