; and (B) in a State or Indian tribe that is not eligible under subparagraph (A), to a local government that is eligible under this section. (3) Training Of the amounts made available under this subsection, the State or Indian tribe may use amounts required, but not to exceed $750,000 for a State or tribe, to train State, tribal, and local building code officials, or other entities identified by the Secretary. (4) Local governments States may share grants under this subsection with local governments. (h) Studies The Secretary, in consultation with building science experts from the National Laboratories and institutions of higher education, designers and builders of energy-efficient residential and commercial buildings, code officials, and other stakeholders, shall undertake a study of the feasibility, impact, economics, and merit of— (1) code improvements that would require that buildings be designed, sited, and constructed in a manner that makes the buildings more adaptable in the future to become zero-net-energy after initial construction, as advances are achieved in energy-saving technologies; (2) code procedures that adopt energy efficiency measures that are technologically feasible and economically justified