In the event a credit union retains an attorney or hires other persons to assist the credit union in contesting or satisfying the requirements of an order of conservation, the commissioner shall authorize the payment of reasonable fees and expenses for such persons as expenses of the conservatorship. In order for the commissioner to determine the reasonableness of the fees and expenses, the credit union must submit a billing statement showing the billable rate, the number of hours claimed, and a detailed description of services performed and related expenses incurred. The credit union may also submit copies of other bids received for the services, research substantiating the reasonableness of the fees charged, or any other evidence the credit union believes may support the reasonableness of the fees and expenses. Any fees or expenses the commissioner deems unreasonable shall not be authorized for payment.