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| TITLE 37 | PUBLIC SAFETY AND CORRECTIONS |
| PART 1 | TEXAS DEPARTMENT OF PUBLIC SAFETY |
| CHAPTER 4 | COMMERCIAL VEHICLE REGULATIONS AND ENFORCEMENT PROCEDURES |
| SUBCHAPTER B | REGULATIONS GOVERNING TRANSPORTATION SAFETY |
| RULE §4.21 | Report of Valid Positive Result on Alcohol and Drug Test |
| Issue: 03/27/2020 Final/Adopted |
| Issue: 02/07/2020 Proposed |
| Issue: 02/19/2010 Final/Adopted |
| Issue: 12/25/2009 Proposed |
| Issue: 08/10/2007 Final/Adopted |
| Issue: 06/22/2007 Proposed |
| Issue: 04/27/2007 Final/Adopted |
| Issue: 03/02/2007 Proposed |
| Issue: 09/22/2006 Final/Adopted |
| Issue: 07/28/2006 Proposed |
| Issue: 05/26/2006 Final/Adopted |
| Issue: 03/31/2006 Proposed |
| Issue: 12/02/2005 Final/Adopted |
| Issue: 09/30/2005 Proposed |