; (3) limit the right of any unit of State, local, or tribal government to approve or regulate any rate of return on private equity invested in the project; or (4) otherwise supersede any State, local, or tribal law (including any regulation) applicable to the construction or operation of the project. (i) Prevailing rate of wage (1) In general The Secretary shall ensure that laborers and mechanics employed by contractors and subcontractors on a project financed in whole or in part by a Federal credit instrument made available under this section will be paid wages at rates not less than those prevailing on similar construction in the locality, as determined by the Secretary of Labor under subchapter IV of chapter 31 of title 40. (2) Authority of Secretary of Labor With respect to the labor standards specified in paragraph (1), the Secretary of Labor shall have, with respect to the labor standards specified in this subsection, the authority and functions set forth in Reorganization Plan Numbered 14 of 1950 (15 F.R. 3176) and section 3145 of title 40, United States Code. (j) Regulations The Secretary may issue such regulations as the Secretary determines appropriate to carry out this section. (k) Use of American iron, steel, and manufactured goods (1) In general Except as provided by paragraph (2), the Secretary shall make available a Federal credit instrument for a project under this section only if all of the iron, steel, and manufactured goods used in the project are produced in the United States. (2) Exception Upon the submission of a request for a waiver of the requirements under paragraph (1) by an entity, the Secretary may waive paragraph (1) if the Secretary finds that— (A) applying paragraph (1) would be inconsistent with the public interest; (B) iron, steel, and the relevant manufactured goods are not produced in the United States in sufficient and reasonably available quantities and of a satisfactory quality