34 C.F.R. § 76.796
(b) Any adjustments to allocations to charter school LEAs under this subpart must be based on actual enrollment or other eligibility data for the charter school LEA on or after the date the charter school LEA first opens or significantly expands its enrollment, even if allocations or adjustments to allocations to other LEAs in the State are based on enrollment or eligibility data from a prior year.
(Authority: 20 U.S.C. 8065a)