103 of the McKinney-Vento Homeless Assistance Act ( 42 U.S.C. 11302 ) to receive services: Provided further, That unaccompanied youth aged 24 and under or families headed by youth aged 24 and under who are living in unsafe situations may be served by youth-serving providers funded under this heading: Provided further, That persons eligible under section 103(a)(5) of the McKinney-Vento Homeless Assistance Act may be served by any project funded under this heading to provide both transitional housing and rapid re-housing: Provided further, That for all matching funds requirements applicable to funds made available under this heading for this fiscal year and prior fiscal years, a grantee may use (or could have used) as a source of match funds other funds administered by the Secretary and other Federal agencies unless there is (or was) a specific statutory prohibition on any such use of any such funds: Provided further, That none of the funds made available under this heading shall be available to provide funding for new projects, except for projects created through reallocation, unless the Secretary determines that the continuum of care has demonstrated that projects are evaluated and ranked based on the degree to which they improve the continuum of care's system performance: Provided further, That any unobligated amounts remaining from funds made available under this heading in fiscal year 2012 and prior years for project-based rental assistance for rehabilitation projects with 10-year grant terms may be used for purposes under this heading, notwithstanding the purposes for which such funds were appropriated: Provided further, That unobligated balances, including recaptures and carryover, remaining from funds transferred to or appropriated under this heading in fiscal year 2019 or prior years, except for rental assistance amounts that were recaptured and made available until expended, shall be available for the current purposes authorized under this heading in addition to the purposes for which such funds