For the purpose of carrying out this part, there is authorized to be appropriated $64,635,000 for each of fiscal years 2018 through 2022.
If the amounts made available under subsection (a) for a fiscal year are insufficient for providing each State with an allotment under section 290cc–21 of this title of not less than the applicable amount under section 290cc–24(a)(1) of this title, the Secretary shall, from such amounts as are made available under such subsection, make grants to the States for providing to eligible homeless individuals the services specified in section 290cc–22(b) of this title.