by homeless persons and households, as identified by the Secretary, public housing agency administrative performance, and other factors as specified by the Secretary. (c) Availability Assistance made available under this section shall continue to remain available only for homeless persons and households upon turn-over. (d) Renewal funding Renewal of expiring contracts for rental assistance provided under subsection (a) and for administrative fees under such subsection shall, to the extent provided in appropriation Acts, be funded under the section 8 tenant-based rental assistance account. (e) Waiver authority Upon a finding by the Secretary that a waiver or alternative requirement pursuant to this subsection is necessary to ensure that homeless persons and households can obtain housing using rental assistance made available under this section, the Secretary may waive, or specify alternative requirements for, any provision of any statute or regulation that the Secretary administers in connection with the use of funds made available under this section (except for requirements related to fair housing, nondiscrimination, labor standards, and the environment) that relates to screening of applicants for assistance, admission of applicants, and selection of tenants. The Secretary shall require public housing agencies receiving rental assistance funding made available under this section to take all reasonable actions to help assisted persons and families avoid subsequent homelessness. 453. Outreach funding (a) Direct appropriation There is appropriated out of any money in the Treasury not otherwise appropriated for each of fiscal years 2018 through 2022, $100,000,000, to remain available until expended, to the Secretary for grants under this section to provide outreach and coordinate services for persons and households who are homeless or formerly homeless. (b) Grants (1) In general The Secretary shall make grants under this section on a competitive basis only to collaborative applicants who comply with section 402. (2)