48 CFR § 932.102
Description of contract financing methods
November 17, 2020
(e)
(2) Progress payments based on a percentage or stage of completion may be authorized by the Head of the Contracting Activity when a determination is made that progress payments based on costs cannot be practically employed and that there are adequate safeguards provided for the administration of progress payments based on a percentage or stage of completion.
[61 FR 41708, Aug. 9, 1996]