In this Second Order on Reconsideration, the Commission consider again whether nondominant interexchange carriers (IXCs) should be required to make available to the public information concerning the rates, terms, and conditions for all of their interstate, domestic, interexchange services. Like other common carriers, IXCs historically have been required to file tariffs with the appropriate regulatory body (this Commission, in the case of interstate services) establishing the rates, terms, and conditions of service. The tariff does not simply serve as a public source of such information; under the judicially created ``filed-rate'' doctrine, the tariffed rate for a service is the only lawful rate that the carrier may charge for that service. Even if a carrier intentionally misrepresents its rate and a customer relies on the misrepresentation, the carrier cannot be held to the promised rate if it conflicts with the tariffed rate. When a single carrier dominated the interstate, interexchange market, tariffing was an effective tool for ensuring compliance with various common carrier requirements, including rules that require nondiscrimination among customers.