BAY CITY, Mich. - If an Indian tribe prevails on its claim that its health care plan administrator violated the Employee Retirement Income Security Act by charging hidden fees and pursues prejudgment interest, its expert on calculating the interest amount can offer his analysis at trial, a Michigan federal judge ruled May 16, while also blocking the tribe's request for discovery in the interest rate dispute (Saginaw Chippewa Indian Tribe of Michigan, et al. v. Blue Cross Blue Shield of Michigan, No. 1:16-cv-10317, E.D. Mich., 2017 U.S. Dist. LEXIS 56562).