1132. The corporations of the following local municipalities possess the attributes and powers conferred upon county corporations, in addition to those conferred upon local corporations, and they do not form part of the municipalities of the counties within which they are situated:
every municipality already constituted or which may in future be constituted:
(a) in Île-aux-Coudres, in the county of Charlevoix-Ouest;
(b) in Île-aux-Grues, in the county of Montmagny;
(c) in the county of Saguenay, east of rivière Betsiamites.