CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER B—PROCEDURAL RULES (parts 11 to 17) > PART 13—INVESTIGATIVE AND ENFORCEMENT PROCEDURES > SUBPART G—Rules of Practice in FAA Civil Penalty Actions (§13.201 to §13.235) > 13.227—Expert or opinion witnesses.

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.