New York Important Information about Hazardous Materials Endorsement is an endorsement to a commercial driver's license (CDL) issued by the New York Department of Motor Vehicles in order for a driver to transport hazardous materials. This endorsement is required for any driver transporting hazardous materials in a tank or cargo tank motor vehicle, or any driver transporting hazardous materials requiring placarding. There are two types of New York Important Information about Hazardous Materials Endorsement: 1. The H endorsement is required for applicants who plan to transport hazardous materials in a tank or cargo tank motor vehicle. 2. The X endorsement is required for applicants who plan to transport hazardous materials that require placarding.