Do I have to take the HazMat test every three years?

No. The three-year testing requirement is a federal regulation for employers transporting hazardous materials to test their drivers every three years.

The Arizona HazMat test is required only when applying for an original CDL, adding the H endorsement to an existing CDL, renewing a CDL or transferring an out-of-state CDL to Arizona while retaining the H endorsement.