; (B) determine whether the certification submitted by the State or Indian tribe is complete; and (C) if the requirements of subparagraph (B) are satisfied, validate the certification. (6) Limitation Nothing in this section shall be interpreted to require a State or Indian tribe to adopt any building code or provision within a code. (d) States or Indian tribes that do not achieve compliance (1) Reporting A State or Indian tribe that has not made a certification required under subsection (b) or (c) by the applicable deadline shall submit to the Secretary a report on the status of the State or Indian tribe with respect to meeting the requirements and submitting the certification. (2) State sovereignty Nothing in this section shall be interpreted to require a State or Indian tribe to adopt any building code or provision within a code. (3) Local government In any State or Indian tribe for which the Secretary has not validated a certification under subsection (b) or (c), a local government may be eligible for Federal support by meeting the certification requirements of subsections (b) and (c). (4) Annual reports by Secretary (A) In general The Secretary shall annually submit to Congress, and publish in the Federal Register, a report on— (i) the status of model building energy codes; (ii) the status of code adoption and compliance in the States and Indian tribes; (iii) implementation of this section; and (iv) improvements in energy savings over time. (B) Impacts The report shall include estimates of impacts of past action under this section, and potential impacts of further action, on— (i) upfront financial and construction costs, cost benefits and returns (using a simple payback analysis); (ii) resulting energy costs to individuals and businesses