; or (II) due to the circumstances of a State or local government requiring reductions in specific programs, if the State or local government presents to the Secretary a justification and demonstration why other programs could not be reduced and how value capture, public transportation, and affordable transit-oriented development programs in the State will not be disproportionately harmed by such State or local action. (3) Davis-Bacon The Secretary shall ensure that laborers and mechanics employed by contractors and subcontractors in construction work financed by a grant made under this section will be paid wages 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 (commonly known as the Davis-Bacon Act ). (4) Enforcement The Secretary may revoke grant funds provided under this section if a grantee fails to implement the maintenance of effort under paragraph (2)(B) and Davis-Bacon provisions referred to paragraph (3). (5) Evaluation Not later than 3 years after receiving a grant under this section, the grantee shall assess the effectiveness of the use of the funds by evaluating whether the funds created a demonstrable increase in transit capacity and ridership and a reduction in carbon dioxide emissions, vehicle miles traveled, and congestion. (6) Technical assistance The Secretary, through a competitive bid process, may enter into contracts, cooperative agreements, and other agreements with national nonprofit organizations and universities that have the appropriate demonstrated capacity to provide value capture-related technical assistance under this subsection, including guidance on implementing foreign value capture models within the United States. (7) Supplement not supplant Grant funds received under this section shall be used to supplement and not supplant other Federal, State, and local public funds expended on public value capture and affordable transit-oriented development programs in the State or