What does apply is whether the building is legally a 2-3 family property in the first place. The City of Saskatoon's zoning bylaw and building code decide whether a second or third unit counts as a legal suite, and the City's permit records typically span at least 10 years, which is what a lender or a buyer's lawyer will check before treating a suite as legal, regardless of what a rent-stabilization label would have meant elsewhere.
For a Lakeridge landlord, the practical rules are the same procedural ones that apply anywhere in the city: written notice before a rent increase, a defined minimum interval between increases, and a right for either side to take a dispute to the Residential Tenancies process rather than to court. None of that caps what the rent can be; it only governs how an increase is delivered.
If you are deciding whether to keep a Lakeridge multi-unit property as a rental or sell it, the building's legal status matters more to that decision than any rent-control question does. Get your hand-reviewed valuation from Joel Dyck.