Federal Aviation Regulations
Sec. 13.227 — Expert or opinion witnesses.
An employee of the agency may not be called as an expert or opinion witness, for any party other than the FAA, in any proceeding governed by this subpart. An employee of a respondent may not be called by an agency attorney as an expert or opinion witness for the FAA in any proceeding governed by this subpart to which the respondent is a party.
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