41 C.F.R. § 105-70.030 The hearing and burden of proof.
Title 41 - Public Contracts and Property Management
(a) The ALJ shall conduct a hearing on the record in order to determine whether the defendant is liable for a civil penalty or assessment under §105–70.003 and, if so, the appropriate amount of any such civil penalty or assessment considering any aggravating or mitigating factors. (b) The authority shall prove defendant's liability and any aggravating factors by a preponderance of the evidence. (c) The defendant shall prove any affirmative defenses and any mitigating factors by a preponderance of the evidence. (d) The hearing shall be open to the public unless otherwise ordered by the ALJ for good cause shown.
Title 41: Public Contracts and Property Management
PART 105–70—IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL REMEDIES ACT OF 1986
§ 105-70.030 The hearing and burden of proof.

