(1) A determination or approval by the Minister under this Act must be in writing.
(2) A determination or approval takes effect on:
(a) the day stated for the purpose in the determination or approval; or
(b) if no day is stated--the day on which the determination is made or approval is given.
(3) The provision of this Act under which, or for the purposes of which, a determination is made or an approval is given may permit the day of effect of the determination or approval to be a day before the day on which the determination is made, or the approval is given.
(4) If:
(a) a provision of this Act refers to a determination made, approval given or other act or thing done by the Minister; and
(b) no other provision of this Act expressly authorises the Minister to make such a determination, give such an approval or do such an act or thing;
this subsection authorises the Minister to make such a determination, give such an approval or do such an act or thing.
(5) In this Act, unless the contrary intention appears, a reference to a determination or approval by the Minister is a reference to such a determination or approval that is in force.