; or (2) significantly reduce the costs of achieving such targets. (d) Use of dynamic crediting methodologies If the Secretary approves one or more identified dynamic crediting methodologies under subsection (c), the Secretary shall implement the approved methodology to determine the number of clean electricity credits to be issued to an electricity generator in lieu of the methodology provided in 611(d)(2). The Secretary shall apply a dynamic crediting factor approved under subsection (c) for the first full calendar year after such approval, or for the first year of the first compliance period, whichever is later, except that the Secretary may delay use of approved dynamic crediting methodologies by one year if the Secretary finds that additional time is needed for the Secretary or the Commission to take actions necessary for implementation under subsection (e). (e) Implementation (1) The Secretary may, by rule, require that the regional transmission organizations, independent system operators, other balancing authorities, and other appropriate entities provide the Secretary with the information necessary for the Secretary to apply any approved dynamic crediting methodology. (2) At the request of the Secretary, or upon its own initiative, the Commission shall consider whether changes to tariffs on file under section 205 of the Federal Power Act ( 16 U.S.C. 824d ) are necessary to implement the requirements of any rule promulgated by the Secretary under paragraph (1). . 403. Regional clean electricity planning models (a) Development of planning models and data Not later than 2 years after the date of enactment this Act, the Secretary shall make available one or more regional electricity planning models and standardized sets of data, including potential renewable energy hourly production profiles at all potential locations for renewable energy deployment, that States can use to develop plans for portfolios of clean electricity resources that are capable of achieving the emission reduction trajectory provided in