9.—(1) A security directive issued to any person need not be addressed to that particular person, but may be framed in general terms applicable to all persons to whom such a security directive may be issued or to any class of such persons to which that particular person belongs.
(2) If it appears to the Commissioner that an exception from any security directive is required as a matter of urgency in any particular case, the Commissioner may, by a notification given in writing to the person for the time being subject to the security directive, authorise that person to disregard the requirements of the security directive —
(a)
in relation to such aircraft or class of aircraft, or in relation to such persons or property or such description of persons or property; and
(b)
on such occasion or series of occasions, or for such period,
as the Commissioner may specify; and the security directive shall have effect in that case subject to any exceptions so specified.
(3) Any notification given to any person under sub-paragraph (2) with respect to any security directive shall cease to have effect (if it has not already done so) if a security directive is subsequently issued by the Commissioner to that person varying or revoking the original security directive.
(4) Any notification given in writing under sub-paragraph (2) shall be regarded as given to the person to whom it is directed if it is given —
(a)
to any person authorised by that person to receive any such security directive or notification;
(b)
where that person is a body corporate, to the secretary or similar officer of the body corporate; and
(c)
in any other case, to anyone holding a comparable office or position in that person’s employment.
(5) A security directive shall be in writing, except that in cases of extreme urgency, in order to respond rapidly to meet any increased security threat or to take immediate action necessary to remedy weaknesses so as to prevent recurrence, the Commissioner may issue a verbal security directive to any person, which shall be confirmed in writing as soon as practicable thereafter.