10.—(1) Subject to paragraph (2), the Secretary of State may, by a certificate in writing, exempt any person or class of persons from all or any of the requirements or prohibitions imposed by these Regulations and any such exemption may be granted subject to conditions and to a limit of time and may be revoked by the Secretary of State at any time by a further certificate in writing.
(2) The Secretary of State shall not grant any exemption under paragraph (1) unless having regard to the circumstances of the case and in particular to—
(a)the conditions, if any, which he proposes to attach to the exemption; and
(b)any other requirements imposed by or under any enactments which apply to the case,
he is satisfied that neither the health and safety of persons who are likely to be affected by the exemption nor the environment will be prejudiced in consequence of it.
(3) The Secretary of State for Defence may, in the interests of national security, by a certificate in writing, exempt any person from all or any of the requirements or prohibitions imposed by these Regulations in so far as they relate to the transport of any explosives in or on any vehicle owned by or under the control of the armed forces and any such exemption may be granted subject to conditions and to a limit of time and may be revoked at any time by the said Secretary of State by a further certificate in writing.