How often must I take the written test for a HazMat endorsement?
To keep your HazMat endorsement, you must pass the HazMat endorsement written test at a DMV office within two years before the renewal of your NYS CDL. At which DMV offices can I have my fingerprints taken and take the written test for a HazMat endorsement? Only the DMV offices listed below can take your fingerprints. You can take the HazMat endorsement test at any of the offices listed, or you can take the test at another DMV office. See the list of all DMV offices for information about offices that do not provide written tests.