The United States Transportation Security Administration (TSA) implemented this program to meet the requirements of the USA Patriot Act, which prohibits states from issuing a hazardous materials endorsement (HME) on a commercial driver's license (CDL) until TSA determines whether or not an applicant poses a security risk.
If you have an existing HME and no longer want the HME or don't qualify, make a written statement to that effect when you renew your CDL.