New South Wales Consolidated Acts New South Wales Consolidated ActsA by-election to fill a casual vacancy in the office of a councillor or a mayor elected by the electors of an area is to be held on a Saturday that--
(a) falls not later than 3 months after the vacancy occurs, and
(b) is fixed by the general manager (in relation to an election administered by the general manager) or the Electoral Commissioner (in relation to an election administered by the Electoral Commissioner).