; 125 Stat. 673), or through any program blending such Rental Assistance Demonstration and section 18 of the United States Housing Act of 1937 complies with such model standards and techniques. 8. Preservation grants for properties receiving section 8 project-based rental assistance (a) Authorization of appropriations There is authorized to be appropriated for the Secretary of Housing and Urban Development to provide assistance to owners of properties receiving project-based subsidy contracts under section 8 of the United States Housing Act of 1937 ( 42 U.S.C. 1437f ) or to municipalities or other units of local government that may administer repairs to a property receiving such project-based subsidy contracts, $250,000,000, which shall remain available until expended. (b) Set aside for new construction (1) Set aside Of the total amount of funds provided pursuant to this section, not less than 10 percent shall be available to eligible recipients described in subsection (a) for the purpose of adding new dwelling units to properties already receiving project-based subsidy contracts under section 8 of the United States Housing Act of 1937. (2) Eligibility Funds made available under this subsection for new construction may only be used by an eligible recipients who are already receiving an award for rehabilitation under this section. (3) Priority of work Eligible recipients who receive funds for both new construction and for rehabilitation shall complete rehabilitation work before beginning new construction and shall provide certification to the Secretary, in a manner to be determined by the Secretary, that the rehabilitation has been completed in a satisfactory manner to eliminate health and safety risks before receiving any funds for new construction. (4) Model building standards Within one year after the publication of the model building standards under section 7(b)(4), the Secretary shall require eligible recipients who receive funds for new construction and rehabilitation to ensure that new construction and