Reference Re Residential Tenancies Act (Ontario)

Reference Re Residential Tenancies Act (Ontario), [1981] 1 S.C.R. 714 is a leading Supreme Court of Canada decision on the jurisdiction of superior courts provided by section 96 of the "Constitution Act, 1867". The Court formulated a three-step test for determining whether an administrative body was encroaching upon the jurisdiction of the superior courts.
Test formulated by Court.
Justice Dickson, writing for the majority, suggested the test. 
In this case, it was determined that Ontario's Residential Tenancies Act was not valid provincial legislation.
Subsequent case law.
The test was later applied in "Massey-Ferguson Industries v. Govt. of Sask.", [1981] 2 S.C.R. 413, and eventually modified in "Sobeys Stores v. Yeomans", [1989] 1 S.C.R. 238.