Not later than 60 days after an appropriation becomes available to carry out this part for a fiscal year, the Secretary shall, except in the case of waivers granted under section
300ff–15
(c) of this title, disburse 50 percent of the amount appropriated under section
300ff–77 of this title for such fiscal year through grants to eligible areas under section
300ff–11
(a) of this title, in accordance with paragraph (3). The Secretary shall reserve an additional percentage of the amount appropriated under section
300ff–77 of this title for a fiscal year for grants under this part to make grants to eligible areas under section
300ff–11
(a) of this title in accordance with paragraph (4).