• Part 1-2 - PARTS 1-2 [RESERVED]

• Part 3 [§ 3.1 - § 3.9] - PART 3—PETITIONS FOR RULEMAKING

• Part 4 - PART 4 [RESERVED]

• Part 5 [§ 5.1 - § 5.49] - PART 5—DISCLOSURE OF RECORDS AND INFORMATION

• Part 7 [§ 7.1 - § 7.32] - PART 7—CLASSIFIED NATIONAL SECURITY INFORMATION

• Part 9 [§ 9.1 - § 9.52] - PART 9—RESTRICTIONS UPON LOBBYING

• Part 11 [§ 11.1 - § 11.15] - PART 11—CLAIMS

• Part 13 [§ 13.1 - § 13.47] - PART 13—ADMINISTRATIVE REMEDIES FOR FALSE CLAIMS AND STATEMENTS

• Part 15 [§ 15.1 - § 15.70] - PART 15—ENFORCEMENT OF NONDISCRIMINATION ON THE BASIS OF DISABILITY IN PROGRAMS OR ACTIVITIES CONDUCTED BY THE DEPARTMENT OF HOMELAND SECURITY

• Part 17 [§ 17.100 - § 17.635] - PART 17—NONDISCRIMINATION ON THE BASIS OF SEX IN EDUCATION PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE

• Part 19 [§ 19.1 - § 19.12] - PART 19—NONDISCRIMINATION IN MATTERS PERTAINING TO FAITH-BASED ORGANIZATIONS

• Part 21 [§ 21.1 - § 21.21] - PART 21—NONDISCRIMINATION ON THE BASIS OF RACE, COLOR, OR NATIONAL ORIGIN IN PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE DEPARTMENT OF HOMELAND SECURITY

• Part 25 [§ 25.1 - § 25.10] - PART 25—REGULATIONS TO SUPPORT ANTI-TERRORISM BY FOSTERING EFFECTIVE TECHNOLOGIES

• Part 27 [§ 27.100 - § 27.410] - PART 27—CHEMICAL FACILITY ANTI-TERRORISM STANDARDS

• Part 29 [§ 29.1 - § 29.9] - PART 29—PROTECTED CRITICAL INFRASTRUCTURE INFORMATION

• Part 37 [§ 37.1 - § 37.71] - PART 37—REAL ID DRIVER'S LICENSES AND IDENTIFICATION CARDS

• Part 46 [§ 46.101 - § 46.124] - PART 46—PROTECTION OF HUMAN SUBJECTS

• Part 115 [§ 115.5 - § 115.205] - PART 115—SEXUAL ABUSE AND ASSAULT PREVENTION STANDARDS

• Part 124 [§ 124.1 - § 124.22] - PART 124—COUNTER-UNMANNED AIRCRAFT SYSTEM AUTHORITY FOR STATE, LOCAL, TRIBAL, AND TERRITORIAL LAW ENFORCEMENT AND CORRECTIONAL AGENCIES

• Part 126 [§ 126.1 - § 126.31] - PART 126—TRANSPORTATION SECURITY OVERSIGHT BOARD REVIEW PANEL PROCESS AND PROCEDURES

• Part 139 [§ 139.1 - § 139.85] - PART 139—CONDUCT ON FEDERAL PROPERTY

• Part 158 [§ 158.101 - § 158.1003] - PART 158—CYBERSECURITY TALENT MANAGEMENT SYSTEM (CTMS)

• Part 159-199 - PARTS 159-199 [RESERVED]