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Dennis v. Ontario Lottery And Gaming Corporation, 2011 ONSC 7024 (Div. Ct.) (rule 4.1 – duty of expert witness; rule 53.03 – expert witnesses)

Judgment Released: December 2, 2011  Link to Judgment

Rule 4.1 confirms that an expert’s duty of impartiality prevails over any duty owed to the parties who retained the expert. The new procedures in Rule 53.03(2.1) requiring the execution of an Acknowledgement of Expert’s Duty applies only to trials, not to class action certification motions; however, “one could make the case” that it would be good practice on a certification motion to include the matters set out in Rule 53.03(2.1) in an expert’s report.

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