CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER XII—TRANSPORTATION SECURITY ADMINISTRATION, DEPARTMENT OF HOMELAND SECURITY (Parts 1500–1580) > SUBCHAPTER D—MARITIME AND LAND TRANSPORTATION SECURITY (Parts 1570–1580) > PART 1572—CREDENTIALING AND SECURITY THREAT ASSESSMENTS > SUBPART B—Standards for Security Threat Assessments (§1572.101 to §1572.111-1572.139)