; or (B) an alternative method that yields an accurate measure of compliance. (3) Achievement of compliance A State or Indian tribe shall be considered to achieve full compliance under paragraph (1) if— (A) at least 90 percent of building space covered by the code in the preceding year substantially meets all the requirements of the applicable code specified in paragraph (1), or achieves equivalent or greater energy savings level; or (B) the estimated excess energy use of buildings that did not meet the applicable code specified in paragraph (1) in the preceding year, compared to a baseline of comparable buildings that meet this code, is not more than 5 percent of the estimated energy use of all buildings covered by this code during the preceding year. (4) Significant progress toward achievement of compliance A State or Indian tribe shall be considered to have made significant progress toward achieving compliance for purposes of paragraph (1) if the State or Indian tribe— (A) has developed and is implementing a plan for achieving compliance during the 8-year-period beginning on the date of enactment of this paragraph, including annual targets for compliance and active training and enforcement programs; and (B) has met the most recent target under subparagraph (A). (5) 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 State or Indian tribe has demonstrated meeting the criteria of this subsection, including accurate measurement of compliance