The Rental housing act includes a reference to Unfair Practice Regulations. These are published from time to time by the provincial minister of housing.
A copy of the current regulations is available here. Unfair Practice Regulations
Disputes arising from a breach of these regulations should be referred to the Rental Housing Tribunal (RHT). There is some disagreement as to wether the RHT is required to hear these disputes or if a party can approach a court directly. It seems for the time being better to take all disputes to the RHT first before approaching the courts to resolve any disputes.
Unfair_Practice_and_Exclusive_Jurisdiction_Rental_Housing_Tribunal