The hybrid model of FLLRIC approach provides a view on likely costs of the network going forward verified against actual past performance and further allows detailed scenario and sensitivity modeling to be performed. A Service Provider with significant market power should be required to publish, a Reference Interconnect Offer (RIO). In the absence of agreement on the terms of interconnection between the two interconnecting parties, the Model RIO published by Telecom Regulatory Authority of India (TRAI) must prevail.