• Part of the process for obtaining a Hazmat endorsement is passing a. • A criminal record could keep a driver from clearing the TSA background check and getting a Hazmat endorsement. • Hazmat endorsements will need to be renewed at least every 5 years. HAZMAT Endorsement For CDL Drivers: • In order to transport hazardous materials, drivers must hold a valid CDL for the state in which they are applying, and pass a Hazardous Materials Endorsement Knowledge Test. You can use our to help you study. • See Also: • The TSA (Transportation Security Administration), in accordance with the USA Patriot Act, has added another level to the process, called the, which will include submitting fingerprints and passing a background check. As always, it is important for new/potential drivers to be up-front about any items that may raise red flags on background checks.