39 C.F.R. § 956.16 Burden of proof and evidence.
Title 39 - Postal Service
(a) Each party may introduce and examine witnesses and submit physical evidence. The Ethical Conduct Officer has the burden of proof in any proceeding under this part and must establish a violation by a preponderance of the evidence. (b) Except as otherwise provided in these rules, the Federal Rules of Evidence shall be applicable to the hearings conducted under this part. Such rules may be relaxed, however, to the extent that the presiding officer deems proper to insure a fair hearing. (c) Testimony shall be under oath or affirmation, and witnesses shall be subject to cross-examination. (d) Agreed statements of fact may be received in evidence. (e) Official notice or knowledge may be taken of the types of matters of which judicial notice or knowledge may be taken. (f) Each party may present oral argument.
Title 39: Postal Service
PART 956—RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO DISCIPLINARY ACTION FOR VIOLATION OF RESTRICTIONS ON POST-EMPLOYMENT ACTIVITY
§ 956.16 Burden of proof and evidence.

