The application shall be accompanied by a statement fully documenting the fees and expenses for which an award is sought. A separate itemized statement shall be submitted for each professional firm or individual whose services are covered by the application, showing the hours spent in work in connection with the proceeding by each individual, a description of the specific services performed, the rate at which each fee has been computed, any expenses for which reimbursement is sought, the total amount claimed, and the total amount paid or payable by the applicant or by any other person or entity for the services performed. The administrative law judge or the Board of Directors may require the applicant to provide vouchers, receipts, or other substantiation for any expenses claimed.