(1) Subject to any relevant regulations under section five of this Act, an application for the revocation, suspension or variation of an air service licence may be made to the Board at any time by any of the persons prescribed in pursuance of paragraph (b) of subsection (1) of that section.
(2) Whether or not any application or representation has been made to the Board for the purpose, if in the case of any person who is the holder of an air service licence the Board are at any time no longer satisfied as mentioned in paragraph (a) of subsection (2) of section two of this Act, they shall, as may appear to them appropriate in the circumstances, revoke, suspend or vary that licence.
(3) Without prejudice to the last foregoing subsection, if at any time the Board are satisfied, whether or not any application or representation has been made to them for the purpose, that it is right and proper so to do, they may revoke, suspend or vary any air service licence.
(4) Subsections (2) to (4) of section two of this Act shall have effect with the necessary modifications in relation to the Board's functions under the two last foregoing subsections as they have effect in relation to their functions under the said section two.
(5) If any air service licence is revoked, suspended or varied by the Board otherwise than on the application of the holder of the licence, the revocation, suspension or variation shall not take effect until the expiration of the period prescribed under section five of this Act for the making of an appeal against the Board's decision nor, if an appeal is duly made during that period, until the determination or abandonment of the appeal.