Section R. 500.1308 - Expense provisionsRule 8.
(1) The expense portion of a rate shall, with regard to each category of expense, be examined and evaluated independently of the loss portion of the rate. Expenses shall not be presumed to change by the same percentage as losses are anticipated to change.(2) Predictions of future expense costs shall give due consideration to trends and changes in historical expense levels, in actual or reasonably allocated expenses incurred, and in external expense indices and indicators.Mich. Admin. Code R. 500.1308