CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER XII—TRANSPORTATION SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY (Parts 1500–1580) > SUBCHAPTER A—ADMINISTRATIVE AND PROCEDURAL RULES (Parts 1500–1515) > PART 1503—INVESTIGATIVE AND ENFORCEMENT PROCEDURES > SUBPART C—Investigative Procedures (§1503.201 to §1503.205)