The Federal Communications Commission (Commission) is examining whether its existing rules governing the setting of tariffed rates by local exchange carriers (LECs) provide incentives and opportunities for carriers to increase access demand endogenously with the result that the tariff rates are no longer just and reasonable. The Commission tentatively concluded that it must revise its tariff rules so that it can be confident that tariffed rates remain just and reasonable even if a carrier experiences or induces significant increases in access demand. The Commission sought comment on the types of activities that caused increases in interstate access demand and the effects of such demand increases on the cost structures of LECs. The Commission also sought comment on several means of ensuring just and reasonable rates going forward. The NPRM invited comment on potential traffic stimulation by rate-of-return LECs, price cap LECs, and competitive LECs, as well as other forms of intercarrier traffic stimulation. Comments were received on December 17, 2007, and reply comments were received on January 16, 2008. On February 8, 2011, the Commission adopted a Further Notice of Proposed Rulemaking seeking comment on proposed rule revisions to address access stimulation. The Commission sought comment on a proposal to require rate-of-return LECs and competitive LECs to file revised tariffs if they enter into or have existing revenue sharing agreements. The proposed tariff filing requirements vary depending on the type of LEC involved. The Commission also sought comment on other record proposals and on possible rules for addressing access stimulation in the context of intra-MTA call terminations by CMRS providers. Comments were filed on April 1, 2011, and reply comments were filed on April 18, 2011. In the USF/ICC Transformation Order, we defined access stimulation. The access stimulation definition we adopted has two conditions: (1) a revenue sharing condition; and (2) an additional traffic volume condition, which is met where the LEC either; (a) has a three-to-one interstate terminating-to-originating traffic ratio in a calendar month; or (b) has had more than a 100 percent growth in interstate originating and/or terminating switched access minutes of use in a month compared to the same month in the preceding year. If both conditions are satisfied, the LEC generally must file revised tariffs to account for its increased traffic.