26.—(1) The competent authority may, by a certificate in writing, exempt—
(a)any person or class of persons; or
(b)any genetically modified organism or class of genetically modified organisms,
from all or any of the requirements of, or prohibitions imposed by, these Regulations.
(2) An exemption may be granted subject to conditions and to a time limit and may be revoked by a certificate in writing at any time.
(3) The competent authority shall not grant an exemption unless, having regard to the circumstances of the case and in particular to—
(a)the conditions, if any, that it proposes to attach to the exemption; and
(b)any relevant requirements imposed by or under any enactments,
it is satisfied about the matters referred to in paragraph (4).
(4) The matters are—
(a)that the health or safety of persons who are likely to be affected by the exemption will not be prejudiced in consequence of it; and
(b)where the exemption relates to a contained use involving a micro-organism, that the environment will not be prejudiced in consequence of the exemption.