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U.S. State Codes
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Texas
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Transportation Code
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Title 7 - Vehicles and Traffic
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Subtitle F - Commercial Mot...
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Chapter 644 - Commercial Motor Vehicle Safety S...
Chapter 644 - Commercial Motor Vehicle Safety Standards
Subchapter A. General Provisions
Subchapter B. Adoption of Rules
Subchapter C. Administrative Enforcement
Subchapter D. Offenses, Penalties, and Judicial Enforcement
Subchapter E. Routing of Hazardous Materials
Subchapter F. Report on Alcohol and Drug Testing