The Minister may, by notification published in the gazette—
(a) specify guidelines for the giving of directions, in the event of a liquid fuel emergency being proclaimed, for regulating or prohibiting the supply by relevant persons in the course of business of a refined liquid petroleum product of a kind specified in the notification; and
(b) vary guidelines specified under this section, including guidelines varied by reason of a previous application of this section; and
(c) revoke guidelines specified under this section, including guidelines varied by reason of a previous application of this section.