47 C.F.R. § 1.351
Rules of evidence
In hearings subject to this subpart B, any oral or documentary evidence may be adduced, but the presiding officer shall exclude irrelevant, immaterial, or unduly repetitious evidence.
In hearings subject to this subpart B, any oral or documentary evidence may be adduced, but the presiding officer shall exclude irrelevant, immaterial, or unduly repetitious evidence.