49 C.F.R. § 1503.224 Burden of proof.
Title 49 - Transportation
(a) Except in the case of an affirmative defense, the burden of proof is on the agency. (b) Except as otherwise provided by statute or rule, the proponent of a motion, request, or order has the burden of proof. (c) A party who has asserted an affirmative defense has the burden of proving the affirmative defense.
Title 49: Transportation
PART 1503—INVESTIGATIVE AND ENFORCEMENT PROCEDURES
Subpart G—Rules of Practice in Transportation Security Administration (TSA) Civil Penalty Actions
§ 1503.224 Burden of proof.