2. The Secretary of State may decide to apply the exemption—N.I.
(a)to a person, including the Secretary of State, or a category of persons;
(b)to one or more requirement or prohibition at the same time;
(c)prospectively;
(d)for a limited or unlimited period;
(e)generally or to a particular case;
(f)subject to such limitations and conditions as the Secretary of State sees fit.