To the extent that amounts are provided in advance in appropriations Acts, the Secretary may make grants to public housing agencies on behalf of public housing residents, recipients under the Native American Housing Assistance and Self-Determination Act of 1996 [25 U.S.C. 4101 et seq.] (notwithstanding section 502 of such Act [25 U.S.C. 4181]) on behalf of residents of housing assisted under such Act, or directly to resident management corporations, resident councils, or resident organizations (including nonprofit entities supported by residents), for the purposes of providing a program of supportive services and resident empowerment activities to provide supportive services to public housing residents and residents of housing assisted under such Act or assist such residents in becoming economically self-sufficient.