Texas CDL Disqualifications and Responsibilities

Commercial drivers must protect the validity of one driver record, follow medical and operating restrictions, and disclose required conviction and employment information. A violation in a personal vehicle can sometimes affect commercial privileges even when no CMV was involved.

CDL disqualification can follow offenses such as driving under the influence, refusing a required alcohol or controlled-substance test, leaving an accident scene, using a vehicle to commit a felony, driving a CMV while disqualified, or causing a fatality through negligent CMV operation. The duration depends on the offense, vehicle, cargo, history, and governing law.

Repeated serious violations can produce disqualification. Examples include excessive speeding of 15 mph or more above the limit, reckless driving, improper or erratic lane changes, following too closely, specified fatal-crash violations, and operating a CMV without the required CDL or endorsement. Review the exact counting period and current rule rather than assuming every citation has the same effect.

Violating railroad-highway grade-crossing duties or operating in violation of an out-of-service order carries separate commercial sanctions. HazMat and passenger operation can increase the consequences. Obey an out-of-service order even when delivery schedules or employer instructions create pressure.

The prohibited CMV alcohol concentration is lower than the ordinary-driving standard, and a driver with detectable alcohol can be removed from safety-sensitive operation. CDL holders are also subject to employer testing programs and federal clearinghouse requirements when applicable. Never rely on the time since the last drink as proof of fitness.

Report convictions, suspensions, revocations, disqualifications, and required employer information within the applicable deadlines. Keep address, medical certification, endorsements, and restrictions current. Before accepting a vehicle or load, verify that the CDL class and endorsements authorize the operation.

The March 2026 DL-7C retains the CMV alcohol and disqualification rules and adds an explicit DPS electronic Drug and Alcohol Clearinghouse eligibility check during issuance.