14 CFR § 16.227
Standard of proof
July 13, 2020
The hearing officer shall issue an initial decision or rule in a party's favor only if the decision or ruling is in accordance with law and supported by a preponderance of the reliable, probative, and substantial evidence contained in the record.
[Amdt. 16-1, as amended at 78 FR 56147, Sept. 12, 2013]