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 local government. (8) Value capture policy requirements (A) Value capture policy Not later than October 1 of the fiscal year that begins 2 years after the date of enactment of this section, the Secretary, in collaboration with State departments of transportation, metropolitan planning organizations, and regional council of governments, shall establish voluntary and consensus-based value capture standards, policies, and best practices for State and local value capture mechanisms that promote greater investments in public transportation and affordable transit-oriented development. (B) Report Not later than 15 months after the date of enactment of this section, the Secretary shall make available to the public a report cataloging examples of State and local laws and policies that provide for value capture and value sharing that promote greater investment in public transportation and affordable transit-oriented development. (C) Best practices Based on the report required under subparagraph (B), the Secretary shall identify and disseminate examples of best practices where States and local governments have adopted value capture and value sharing mechanisms that have successfully provided for greater investment in public transportation and affordable transit-oriented development. (b) Definitions In this section: (1) Affordable commercial space The term affordable commercial space means commercial space dedicated to either protect or promote small and disadvantage businesses provided below market rent value. (2) Affordable housing The term affordable housing means housing, the cost of which does not exceed 30 percent of the income of a family. (3) Transit-oriented development The term transit-oriented development means a mix of commercial, residential, office, and