Section 51.901 - Purpose and scope of transitional access service pricing rules(a) The purpose of this section is to establish rules governing the transition of intercarrier compensation from a calling-party's-network pays system to a default bill-and-keep methodology. Following the transition, the exchange of traffic between and among service providers will, by default, be governed by bill-and-keep arrangements.(b) Effective December 29, 2011, the provisions of this subpart apply to reciprocal compensation for telecommunications traffic exchanged between telecommunications providers that is interstate or intrastate exchange access, information access, or exchange services for such access, other than special access. See FCC 11-161, figure 9 (chart identifying steps in the transition).