(1) Subject to subsection (2), a direction given under this Part remains in force until the end of the period of national liquid fuel emergency in which it was given unless it is:
(a) sooner revoked; or
(b) sooner set aside by a court.
(2) If:
(a) during a period (the earlier period ) of national liquid fuel emergency, a Proclamation under subsection 16(1) declares that a national liquid fuel emergency will exist during a period (the later period ) starting immediately after the end of the earlier period; and
(b) a direction under this Part is in force immediately before the end of the earlier period (including because of one or more previous applications of this subsection);
the direction continues in force until the end of the later period unless it is:
(c) sooner revoked; or
(d) sooner set aside by a court.