Purpose The purpose of this document is to provide guidelines for NPA code relief planning activities. This includes the relief planning process@ industry notification process and NANPA's1 responsibilities to affected parties and applicable regulatory authorities within the North American Numbering Plan area. It also provides relief planning principles@ administrative responsibilities and industry notification requirements. The steps of the NPA code relief planning process are listed and the alternative methods of providing relief and their various attributes are described. 1 In the U.S.@ CO Code Administration and NPA Relief Coordination is currently done by the NANPA except in those states that have chosen to act as their own NPA Relief Coordinator. Presently@ the Ohio PSC has chosen to be the NPA Relief Coordinator for the state of Ohio. ATIS INC Central Office Code (NXX) Assignment Guidelines (ATIS-0300051)@ and ATIS NGIIF- Recommended Notification Procedures to Industry for Changes in Access Network Architecture (ATIS-0300046).