; (B) appraisers; (C) energy raters and residential energy consumption experts; (D) energy efficiency organizations; (E) real estate agents; (F) home builders and remodelers; (G) State energy officials; and (H) others as determined by the Secretary. (g) Additional study (1) In general Not later than 18 months after the date of enactment of this Act, the Secretary shall reconvene the advisory group established in subsection (f)(2), in addition to water and locational efficiency experts, to advise the Secretary on the implementation of the enhanced energy efficiency underwriting criteria established in subsections (c) and (d). (2) Recommendations (A) In general The advisory group established in subsection (f)(2) shall provide recommendations to the Secretary on any revisions or additions to the enhanced energy efficiency underwriting criteria deemed necessary by the group, which may include alternate methods to better account for home energy costs and additional factors to account for substantial and regular costs of homeownership such as location-based transportation costs and water costs. (B) Legislative recommendations The Secretary shall forward any legislative recommendations from the advisory group to Congress for consideration. 5. Energy-efficient certifications for manufactured housing with mortgages Section 526 of the National Housing Act ( 12 U.S.C. 1735f–4(a) ) is amended— (1) in subsection (a)— (A) by striking , other than manufactured homes, each place such term appears; (B) by inserting after the period at the end the following: The energy performance requirements developed and established by the Secretary under this section for manufactured homes shall require energy star rating for wall fixtures, appliances, and equipment in such housing. ; (C) by inserting (1) after (a)