27.1 (1) Every person on an aircraft in flight is justified in using as much force as is reasonably necessary to prevent the commission of an offence against this Act or another Act of Parliament that the person believes on reasonable grounds, if it were committed, would be likely to cause immediate and serious injury to the aircraft or to any person or property therein.

(2) This section applies in respect of any aircraft in flight in Canadian airspace and in respect of any aircraft registered in Canada in accordance with the regulations made under the Aeronautics Act in flight outside Canadian airspace.