The Postal Service may grant expedited processing of requests under certain circumstances. See 39 CFR 265.5(c). This determination may be made by the records custodian or the referring FOIA RSC as appropriate. The requester must be notified of the determination within 10 calendar days and provided with appeal procedures, if expedited processing is denied. See 4-4.28. If expedited processing is granted, the request is processed as soon as practicable. Records custodians will be notified whether a request has been granted expedited processing upon referral from the FOIA RSC.