44 CFR § 208.52
Reimbursement procedures
May 13, 2020
(a) General. A Sponsoring Agency must present a claim for reimbursement to DHS in such manner as the Assistant Administrator specifies .
(b) Time for submission.
(1) Claims for reimbursement must be submitted within 90 days after the end of the Personnel Rehabilitation Period specified in the Demobilization Order.
(2) The Assistant Administrator may extend and specify the time limitation in paragraph (b)(1) of this section when the Sponsoring Agency justifies and requests the extension in writing.