§ Casual vacancies in the office of alderman or councillor shall be held in like manner as before the passing of this Act save that a casual vacancy in the office of alderman for any group of wards shall be filled by election to be held for such group of wards. A person elected alderman or councillor at a casual election shall hold office for the remainder of the period for which the person whose place he is elected to fill was elected to fill, and no longer, but shall be eligible for re-election if then qualified.
§ Clause 23,—