255.—(1) This article applies to any permission granted by the Secretary of State under article 250 or by the CAA under article 250 or article 252.
(2) Subject to paragraph (7), the Secretary of State or the CAA may revoke, suspend or vary any permission to which this article applies after having given notice to the other and considered representations from the operator or charterer concerned.
(3) Subject to paragraph (7), the Secretary of State or the CAA may without notice revoke, suspend or vary any permission to which this article applies for reasons of urgency, in which case paragraph (4) applies.
(4) Where this paragraph applies, the person who revoked, suspended or varied any permission without notice under paragraph (3) must consider any representations made subsequently by the operator or charterer concerned and in response to such representations may—
(a)confirm, vary or lift the suspension;
(b)confirm the revocation of permission; or
(c)reinstate the permission with or without additional or varied conditions.
(5) In acting under paragraph (4), the Secretary of State or the CAA must act as soon as reasonably practicable.
(6) In particular, and without limitation, the Secretary of State may exercise the powers under paragraphs (2) and (3) if it appears that—
(a)the operator or charterer has committed a breach of any condition to which the permission is subject;
(b)any agreement between Her Majesty’s Government in the United Kingdom and the Government of any other country pursuant to which the permission was granted is no longer in force or that the other Government has breached the agreement;
(c)the operator or charterer who has been granted permission, or a Government of another country which is a party to an agreement referred to in sub-paragraph (b), or the aeronautical authorities of the country concerned, has—
(i)acted in a manner which is inconsistent with or prejudicial to the operation in good faith, according to its object and purpose, of any such agreement; or
(ii)engaged in unfair, discriminatory or restrictive practices to the prejudice of the holder of an air transport licence or a route licence in the operation of air services; or
(d)the operator or charterer, having been granted permission as a result of being designated by the Government of any other country for the purposes of an agreement referred to in sub-paragraph (b)—
(i)is no longer so designated; or
(ii)has conducted itself in such a way or is involved in such circumstances that the Secretary of State considers the exercise of those powers to be necessary or expedient.
(7) The CAA may only exercise the powers in paragraph (2) or (3) if it considers it necessary or expedient to do so for reasons of aviation safety.