New South Wales Consolidated RegulationsAn election to fill a vacancy in the office of Chancellor or Deputy Chancellor is to be held (where practicable):
(a) in the case of a vacancy that arises because of the expiration of the term of office of the current office holder-at least 3 months before the expiration of the term of office of the current office holder, or
(b) in the case of a casual vacancy-within 3 months after the vacancy arises.