; and (2) support full compliance with the State and local codes. (c) State and Indian tribe certification of building energy code updates (1) Review and updating of codes by each State and Indian tribe (A) In general Not later than 2 years after the date of publication of a revision to a model building energy code, each State or Indian tribe shall certify whether the State or Indian tribe, respectively, has reviewed and updated the energy provisions of the building code of the State or Indian tribe, respectively. (B) Demonstration The certification shall include a demonstration of whether the energy savings for the code provisions that are in effect throughout the territory of the State or Indian tribe meet or exceed the energy savings of the updated model building energy code. (C) No model building energy code update If a model building energy code is not updated by a target date established under section 307(b)(2)(E), each State or Indian tribe shall, not later than 2 years after the specified date, certify whether the State or Indian tribe, respectively, has reviewed and updated the energy provisions of the building code of the State or Indian tribe, respectively, to meet or exceed the target in section 307(b)(2). (2) Validation by Secretary Not later than 90 days after a State or Indian tribe certification under paragraph (1), the Secretary shall— (A) determine whether the code provisions of the State or Indian tribe, respectively, meet the criteria specified in paragraph (1); and (B) if the determination is positive, validate the certification. (d) Improvements in compliance with building energy codes (1) Requirement (A) In general Not later than 3 years after the date of a certification under subsection (c), each State and Indian tribe shall certify whether the State and Indian tribe, respectively, has— (i) achieved full compliance under paragraph (3) with the applicable certified State and Indian tribe building energy code or with the associated model building energy code