FAA Federal Aviation Regulations (FARS, 14 CFR)

Each aircraft operator shall adopt a contingency plan and shall:

(a) Implement its contingency plan when directed by the Administrator.

(b) Ensure that all information contained in the plan is updated annually and that appropriate persons are notified of any changes.

(c) Participate in an airport operator-sponsored exercise of the airport contingency plan or its equivalent, as provided in its security program.