permanent supportive housing for chronically homeless individuals and families;

for homeless families, rapid rehousing services, short-term flexible subsidies to overcome barriers to rehousing, support services concentrating on improving incomes to pay rent, coupled with performance measures emphasizing rapid and permanent rehousing and with leveraging funding from mainstream family service systems such as Temporary Assistance for Needy Families and Child Welfare services; and

any other activity determined by the Secretary, based on research and after notice and comment to the public, to have been proven effective at reducing homelessness generally, reducing homelessness for a specific subpopulation, or achieving homeless prevention and independent living goals as set forth in section 11386a(b)(1)(F) of this title.