48 C.F.R. § 1227.304-4
(b) Contractors may appeal agency actions listed at FAR 27.304-4(a)(1), (3), and (4) to the cognizant Head of the Contracting Activity (HCA). Contracting officers shall coordinate actions under this section with the legal counsel of the responsible office. The following procedures apply:
(c) Contractor appeal of decisions rendered under FAR 27.304-4(a)(2) are subject to the following requirements:
(2) The HCA may hold an informal hearing if deemed appropriate or at the request of the contractor. The informal hearing shall be held after all fact-finding is completed.
(3) The HCA shall designate an impartial fact-finding official. The official conducting the fact-finding shall prepare findings of fact and transmit them to the HCA promptly after the conclusion of the fact-finding proceeding along with a recommended determination.