A State educational agency or local educational agency shall use Federal funds received under this part only to supplement the funds that would, in the absence of such Federal funds, be made available from State and local sources for the education of students participating in programs assisted under this part, and not to supplant such funds.
To demonstrate compliance with paragraph (1), a local educational agency shall demonstrate that the methodology used to allocate State and local funds to each school receiving assistance under this part ensures that such school receives all of the State and local funds it would otherwise receive if it were not receiving assistance under this part.
Except as provided in paragraphs (4) and (5), a local educational agency may receive funds under this part only if State and local funds will be used in schools served under this part to provide services that, taken as a whole, are at least comparable to services in schools that are not receiving funds under this part.
A local educational agency may meet the requirements of subparagraphs (A) and (B) on a grade-span by grade-span basis or a school-by-school basis.
A local educational agency need not include unpredictable changes in student enrollment or personnel assignments that occur after the beginning of a school year in determining comparability of services under this subsection.
This subsection shall not apply to a local educational agency that does not have more than one building for each grade span.