OTTAWA – Usage-based billing rates should be set at 15% less than comparable rates for retail Internet services, the CRTC has ruled.Tuesday’s decision comes after the Commission called for comments last October on whether UBB rates for wholesale residence gateway access services (GAS) and third-party Internet access services should be set at levels below the carriers’ respective comparable UBB rates for retail Internet services and, if so, by how much.While determining the amount of the wholesale UBB discount, the Commission said that it considered that if it is too large, the effectiveness of UBB as an economic Internet traffic management...