Commencing with the 1998–99 fiscal year, through and including the fiscal year in which equalization among the special education local plan areas has been achieved, the superintendent shall make the following computations to determine the amount available for making equalization adjustments for the fiscal year in which the computation is made:
(a) Subtract the prior fiscal year funds pursuant to paragraph (1) of subdivision (c) of Section 56836.08 from the current fiscal year funds pursuant to paragraph (1) of subdivision (c) of Section 56836.08.
(b) The amount of any increase in federal funds computed pursuant to subdivision (a) shall result in a reduction in state general funds computed pursuant to paragraph (3) of subdivision (c) of Section 56836.08. This is the amount of state general funds that shall be designated in the annual Budget Act for the purpose of Section 56836.12, as augmented by any deficiency appropriation, for the purposes of equalizing funding for special education local plan areas pursuant to this chapter.
(c) Until the actual amount of any increase in federal funds pursuant to subdivision (a) can be determined for the current fiscal year, equalization apportionments pursuant to Section 56836.12 shall be certified based on the authority available in Item 6110-161-0001 of the Budget Act of 1998, or its successor in the annual Budget Act.