Part 1 - Mississippi Department of Transportation
- Subpart 5101 - Aeronautics (§§ 1-5101-01001-100 — 1-5101-04001-104)
- Subpart 5301 - Rails (§§ 1-5301-01000-100 — 1-5301-02000-101)
- Subpart 5901 - Mississippi Transportation Commission (§§ 1-5901-01001-100 — 1-5901-01002-104)
- Subpart 6001 - Public Transit (§§ 1-6001-01000-100 — 1-6001-01000-600)
- Subpart 6101 - Public Transit (§§ 1-6101-53000-100 — 1-6101-53020-101)
- Subpart 6203 - Office of Civil Rights (§§ 1-6203-00100-200 — 1-6203-01200-106)
- Subpart 6601 - Office of Enforcement (§§ 1-6601-01001-100 — 1-6601-06001-103)
- Subpart 6701 - External Affairs (§§ 1-6701-01001-100 — 1-6701-01003-101)
- Subpart 6801 - Internal Audit Division (§§ 1-6801-01001-100 — 1-6801-01001-105)
- Subpart 7201 - Materials (§§ 1-7201-01000-100 — 1-7201-06000-109)
- Subpart 7301 - Construction Division (§§ 1-7301-00100-100 — 1-7301-00200-101)
- Subpart 7401 - Contract Administration (§§ 1-7401-01000-100 — 1-7401-10000-103)
- Subpart 7501 - Maintenance (§§ 1-7501-03001-100 — 1-7501-22001-501)
- Subpart 7601 - Traffic Engineering Division (§§ 1-7601-00100-100 — 1-7601-00800-1010)
- Subpart 8101 - Administration (§§ 1-8101-00001-100 — 1-8101-00003-250)
- Subpart 8120 - Consulting Services Unit (§§ 1-8120-00001-100 — 1-8120-00001-102)
- Subpart 8301 - Roadway Design (§§ 1-8301-00001-100 — 1-8301-00002-103)
- Subpart 8401 - Right of Way (§§ 1-8401-01000-100 — 1-8401-07100-106)
- Subpart 8501 - Planning (§§ 1-8501-02020-100 — 1-8501-06010-501)
- Subpart 8601 - Research (§§ 1-8601-01001-100 — 1-8601-02008-102)
- Subpart 8701 - Environmental (§§ 1-8701-01000-100 — 1-8701-02000-104)
- Subpart 8801 - Ports and Waterways (§§ 1-8801-01001-100 — 1-8801-01001-105)
- Subpart 9001 - Professional Development (§§ 1-9001-01000-100 — 1-9001-02300-103)
- Subpart 9201 - Financial Management (§§ 1-9201-01000-100 — 1-9201-04000-102)
- Subpart 9301 - Asset Management (§§ 1-9301-00601-100 — 1-9301-02001-101)
- Subpart 9401 - Human Resources (§§ 1-9401-02010-100 — 1-9401-09030-103)
- Subpart 9501 - Procurement (§§ 1-9501-00505-100 — 1-9501-10500-102)