(1) Discontinuance of service. When the commission grants permission for an auto transportation company to discontinue service, the company must file supplements to cancel tariffs and time schedules on file with the commission. If permission is granted to discontinue service to only a portion of routes operated, the company must file supplements reflecting the discontinued routes or new tariffs and time schedules reflecting the routes that are not discontinued.

(2) Lease or sale of authority. An auto transportation company leasing or selling a portion of its certificated authority to another company must file supplements reflecting the transferred routes or new tariffs and time schedules reflecting the routes retained.