Article 11 Power to prevent aircraft flying

If it appears to the CAA or an authorised person that any aircraft is intended or likely to be flown in such circumstances that article 5 of this Order would be contravened in relation to the flight, the CAA or that authorised person may direct the operator or the commander of the aircraft that he is not to permit the aircraft to make the flight or any other flight of such description as may be specified in the direction, until the direction has been revoked by the CAA or by an authorised person, and the CAA or that authorised person may take such steps as are necessary to detain the aircraft.

If the operator or the commander of an aircraft fails without reasonable excuse to comply with a direction given to him pursuant to paragraph (1) of this article, he shall be guilty of an offence.

For the purposes of paragraph (1) of this article, the CAA or any authorised person may enter upon and inspect any aircraft.