200.1. Where a by-election is required to be held owing to a vacancy in the office of a commissioner who remained in office in accordance with any of sections 150 to 152 of the Education Act (chapter I‐13.3), the by-election shall be held(1) in the part of the territory that has been annexed where that territory constituted or included the whole of an electoral division represented by the commissioner, in the case of a commissioner referred to in section 150 of that Act;
(2) in the part of the territory corresponding to the part of the electoral division represented by the commissioner in which the greatest number of electors were resident before the annexation, in the case of a commissioner referred to in section 151 of that Act;
(3) in the part of the territory corresponding to the electoral division represented by the commissioner the whole of which has been integrated, or, where the division represented by the commissioner has not been integrated in its entirety, in the part of the territory corresponding to the part of that division in which the greatest number of electors were resident at the time of integration, in the case of a commissioner referred to in section 152 of that Act.