s 12 Continuity of powers and duties.
(1) Where an Act confers a power or imposes a duty it is implied, unless the contrary intention appears, that the power may be exercised, or the duty is to be performed, from time to time as occasion requires. (2) Where an Act confers a power or imposes a duty on the holder of an office as such, it is implied, unless the contrary intention appears, that the power may be exercised, or the duty is to be performed, by the holder for the time being of the office.