136. An elector who is not domiciled in the territory of the school board and who is the owner of an immovable that is taxable by the school board shall exercise his right to vote in the electoral ward where the taxable immovable is situated or, in the case of an owner who owns taxable immovables in several wards, in the electoral ward where the immovable of highest standardized assessment within the meaning of section 345 according to the assessment roll is situated.