[Code of Federal Regulations] [Title 49, Volume 8] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR1503.227] [Page 267] TITLE 49--TRANSPORTATION CHAPTER XII--TRANSPORTATION SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY PART 1503_INVESTIGATIVE AND ENFORCEMENT PROCEDURES--Table of Contents Subpart G_Rules of Practice in Transportation Security Administration (TSA) Civil Penalty Actions Sec. 1503.227 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 TSA, 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 TSA in any proceeding governed by this subpart to which the respondent is a party.