What is the case law on hearsay and hearsay in the context of business records?

[22] I appreciate that business records of this nature may contain hearsay information. Experts are, of course, entitled to consider hearsay for the purpose of providing their opinion and to that extent may of course be challenged in cross-examination. Certainly, a wholesale ruling by me to allow the filing of this documentation at the hearing, notwithstanding s. 30 of the Canada Evidence Act and the common law dating back to Ares v. Venner, could prove problematic so I do not propose to rule on the admissibility of the documentation at this juncture. I am, however, satisfied that the sealed records are relevant and ought to be produced, subject to rulings on admissibility as documentary evidence, if it should prove necessary. Having regard to the cooperation between counsel to this stage and their knowledge and expertise, I anticipate the need for any further rulings in this regard would likely be limited. CONCLUSION