Chapter 644 - COMMERCIAL MOTOR VEHICLE SAFETY STANDARDS
- Subchapter A - GENERAL PROVISIONS (§§ 644.001 — 644.005)
- Subchapter B - ADOPTION OF RULES (§§ 644.051 — 644.054)
- Subchapter C - ADMINISTRATIVE ENFORCEMENT (§§ 644.101 — 644.104)
- Subchapter D - OFFENSES, PENALTIES, AND JUDICIAL ENFORCEMENT (§§ 644.151 — 644.155)
- Subchapter E - ROUTING OF HAZARDOUS MATERIALS (§§ 644.201 — 644.203)
- Subchapter F - REPORT ON ALCOHOL AND DRUG TESTING (§§ 644.251 — 644.252)