D.C. Mun. Regs. tit. 5-A, § 2903
2903.1 A provider shall issue a prorated refund, or credit upon mutual written agreement with OSSE or the responsible LEA, for any overpayments or prepayments related to a student's placement.
2903.2 If OSSE or an LEA seeks a refund for an overpayment, it must notify the provider that it has thirty (30) days to dispute the charge or pay the undisputed amount. After expiration of thirty (30) days, OSSE or the responsible LEA has seventy-five (75) days within which to request a hearing before the Office of Administrative Hearings (OAH) to obtain a refund.
SOURCE: Final Rulemaking published at 59 DCR 7495, 7499 (June 22, 2012).