42 U.S.C. § 3233

(a) In general

In addition to amounts made available under section 3231 of this title , there are authorized to be appropriated such sums as are necessary to carry out section 3149(c)(2) of this title , to remain available until expended.

(b) Federal share

The Federal share of the cost of activities funded with amounts made available under subsection (a) shall be up to 100 percent.