48 C.F.R. § 32.106
The contracting officer must consider the following order of preference when a contractor requests contract financing, unless an exception would be in the Government's best interest in a specific case:
(a) Private financing without Government guarantee. It is not intended, however, that the contracting officer require the contractor to obtain private financing—
[48 FR 42328, Sept. 19, 1983, as amended at 60 FR 49711, Sept. 26, 1995; 65 FR 16279, Mar. 27, 2000]