D.C. Mun. Regs. tit. 18, r. 18-1328
All drivers renewing or applying for a hazardous material endorsement shall pass a security threat assessment conducted by the Transportation Security Administration of the Federal Department of Homeland Security, and meet all other requirements in 49 CFR Part 1572.
[REPEALED]
Upon receipt of a finding by the Transportation Security Administration that an applicant or permittee represents a security threat, the Director shall refuse to issue, or shall immediately revoke any hazardous materials endorsement effective 5 days after mailing a notice of revocation to the permittee's address in the Department's records.
At least sixty (60) days before the expiration date of the CDL or a hazardous materials endorsement, the Department of Motor Vehicles shall notify the holder of a hazardous materials endorsement that the holder must pass a Transportation Security Administration security threat assessment process as part of his or her application for renewal of the hazardous materials endorsement.
The notice shall advise the driver that, in order to expedite the security screening process, he or she should file a renewal application as soon as possible, but no later than thirty (30) days before the expiration date of the hazardous materials endorsement.
An individual who does not successfully complete the Transportation Security Administration security threat assessment process referenced in this subsection shall not be issued a hazardous materials endorsement.
D.C. Mun. Regs. tit. 18, r. 18-1328