Upon the establishment of unused rate adjustment authority, the Postal Service shall devise and maintain a schedule that tracks the establishment and subsequent use of banked rate authority on a class-by-class basis. At a minimum, the schedule must track the amount of banked rate authority available immediately prior to the rate adjustment filing and the amount of banked rate authority available upon acceptance of the rates included in the rate adjustment filing. It shall also track all changes to the schedule, including the docket numbers of Commission decisions affecting the schedule, the dates and amounts that any rate authority was generated or subsequently expended, and the expiration dates of all rate adjustment authority. The schedule shall be included with any rate adjustment filing purporting to modify the amount of banked rate adjustment authority.