39 C.F.R. § 964.10 Evidence.
Title 39 - Postal Service
(a) In general, admissibility will hinge on relevancy and materiality. However, relevant evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice, or by considerations of undue delay, waste of time, or needless presentation of cumulative evidence. (b) Testimony shall be given under oath or affirmation and witnesses shall be subject to cross-examination. (c) Agreed statements of fact are encouraged and may be received in evidence.
Title 39: Postal Service
PART 964—RULES OF PRACTICE GOVERNING DISPOSITION OF MAIL WITHHELD FROM DELIVERY PURSUANT TO 39 U.S.C. 3003, 3004
§ 964.10 Evidence.