(1) Allocation of increase—
(i) General. Except as provided in paragraph (c)(2) of this section, the Secretary allocates for the fiscal year—
(A) To each State the amount the State received under this section for fiscal year 1999;
(B) Eighty-five (85) percent of any remaining funds to States on the basis of the States’ relative populations of children aged 3 through 21 who are of the same age as children with disabilities for whom the State ensures the availability of FAPE under Part B of the Act; and
(C) Fifteen (15) percent of those remaining funds to States on the basis of the States’ relative populations of children described in paragraph (c)(1)(i)(B) of this section who are living in poverty.
(ii) Data. For the purpose of making grants under this section, the Secretary uses the most recent population data, including data on children living in poverty, that are available and satisfactory to the Secretary.