What are the principles of the relevancy test?

In Brown v. Cape Breton (Regional Municipality), 2011 NSCA 32, [2011] N.S.J. No. 164, Bryson J.A. adopted these principles, and explained that the abolition of the semblance of relevancy test that existed under the Civil Procedure Rules 1972 comes at a cost: judges now have to "determine relevancy long before trial, without the forensic advantages of the trial judge" (para. 12).