The funding program included in the educational services block grant for funding for children requiring special education services in each fiscal year shall be treated in that fiscal year as a payment to the school district in respect of services provided or costs incurred in the prior fiscal year, calculated in each case as provided in this Section. Nothing in this Section shall change the nature of payments for any program that, apart from this Section, would be or, prior to adoption or amendment of this Section, was on the basis of a payment in a fiscal year in respect of services provided or costs incurred in the prior fiscal year, calculated in each case as provided in this Section.
Payments to the school district under this Section with respect to each program for which payments to school districts generally, as of the date of this amendatory Act of the 92nd General Assembly, are on a reimbursement basis shall continue to be made to the district on a reimbursement basis, pursuant to the provisions of this Code governing those programs.
105 ILCS 5/1D-1