(3) (a) to require the owner of an immovable to instal therein and keep in good working order an apparatus or device intended to reduce the risk of any back-flow from a sewer or the consequences of such back-flow, and to provide, in the case of an immovable already erected, a time period to enable the owner to meet that requirement;
(b) to require a level of quality for any apparatus or device it requires to be installed, and to prescribe standards for the installation or maintenance of the apparatus or device, particularly by reference to standards prescribed or approval given by a third person;
(c) to grant a subsidy to the owner, on the conditions prescribed by by-law and notwithstanding the Municipal Aid Prohibition Act (chapter I-15), to enable the owner to meet the requirement set out in subparagraph a;
(d) to divide the territory of the municipality into sectors, to establish classes of immovables, to establish any combination consisting of a sector and class, to provide that the by-law shall apply only in one or more such sectors, to one or more such classes or to one or more such combinations, and to prescribe different rules according to the sectors, classes or combinations.