23 C.F.R. § 630.709 Conversion to a regular Federal-aid project.
Title 23 - Highways
(a) The SHA may submit a written request to the FHWA that a project be converted to a regular Federal-aid project at any time provided that sufficient Federal-aid funds and obligation authority are available. (b) Subsequent to FHWA approval the SHA may claim reimbursement for the Federal share of project costs incurred, provided the project agreement has been executed. If the SHA has previously submitted a final voucher, the FHWA will process the voucher for payment.
Title 23: Highways
PART 630—PRECONSTRUCTION PROCEDURES
Subpart G—Advance Construction of Federal-Aid Projects
§ 630.709 Conversion to a regular Federal-aid project.