Section 51.905 - Implementation(a) The rates set forth in this section are default rates. Notwithstanding any other provision of the Commission's rules, telecommunications carriers may agree to rates different from the default rates.(b) LECs who are otherwise required to file tariffs are required to tariff rates no higher than the default transitional rates specified by this subpart. (1) With respect to interstate switched access services governed by this subpart, LECs shall tariff rates for those services in their federal tariffs. Except as expressly superseded below, LECs shall follow the procedures specified in part 61 of this chapter when filing such tariffs.(2) With respect to Transitional Intrastate Access Services, originating access charges for Toll Free Calls, and Toll Free Database Query Charges governed by this subpart, LECs shall follow the procedures specified by relevant state law when filing intrastate tariffs, price lists or other instruments (referred to collectively as "tariffs").(c) Nothing in this section shall be construed to require a carrier to file or maintain a tariff or to amend an existing tariff if it is not otherwise required to do so under applicable law.(d) Beginning July 1, 2021, and notwithstanding any other provision of the Commission's rules in this chapter, only the originating carrier in the path of the Toll Free Call may assess a Toll Free Database Query Charge for a Toll Free Call. When the originating carrier is unable to transmit the results of the Toll Free Database Query to the next carrier or provider in the call path, that next carrier or provider may instead assess a Toll Free Database Query Charge. 76 FR 73856 , Nov. 29, 2011, as amended at 85 FR 75916 , Nov. 27, 2020