The FAA has given itself the authority to require security procedures for operations of Part 91 general aviation aircraft weighing more than 12,500 pounds.
Using a special federal aviation regulation (SFAR) that became effective October 1, 2001, the FAA has given itself the authority to require security procedures for operations of Part 91 aircraft weighing more than 12,500 pounds (primarily turbine-powered airplanes). Although the SFAR does not contain specific security requirements for equipment and operations, affected persons would have to implement security procedures released through notam. According to the FAA, "The administrator will require operators to implement these procedures only when it is determined that threat conditions warrant." However, it is unclear how these procedures can be implemented unless they are developed in advance and aircraft owner/operators, airports, and FBOs are prepared to support them.