48   Exercise of statutory functions

(1)  If an Act or instrument confers or imposes a function on any person or body, the function may be exercised (or, in the case of a duty, shall be performed) from time to time as occasion requires.

(2)  If an Act or instrument confers or imposes a function on a particular officer or the holder of a particular office, the function may be exercised (or, in the case of a duty, shall be performed) by the person for the time being occupying or acting in the office concerned.