What is the test for obtaining expert costs in a personal injury case?

The defendant directs the court to the decision of Hamfler v. Mink9 for the proposition that for the court to determine the reasonableness of amounts charged by an expert, the party seeking the costs must provide the court with adequate information to allow the court to properly asses the disbursement claimed. I do not dispute that proposition. The court has an obligation to assess costs and disbursements claimed to ascertain if those costs and disbursements are fair and reasonable. This applies to costs claimed by third parties such as expert witnesses. In exercising that obligation, the more information the court receives the better.