SUBCHAPTER IV—DIRECTORATE OF BORDER AND TRANSPORTATION SECURITY (§§ 201—298)
- Part A—Under Secretary for Border and Transportation Security (§§ 201—203)
- Part B—United States Customs Service (§§ 211—221)
- Part C—Miscellaneous Provisions (§§ 231—239)
- Part D—Immigration Enforcement Functions (§§ 251—256)
- Part E—Citizenship and Immigration Services (§§ 271—279)
- Part F—General Immigration Provisions (§§ 291—298)