49 CFR 383.93 - Endorsements.
(1) In addition to passing the knowledge and skills tests described in subpart G of this part, all persons who operate or expect to operate the type(s) of motor vehicles described in paragraph (b) of this section must pass specialized tests to obtain each endorsement. The State shall issue CDL endorsements only to drivers who successfully complete the tests.
(3) The State must use the codes listed in § 383.153 when placing endorsements on a CLP or CDL.
(b) Endorsement descriptions. An operator must obtain State-issued endorsements to his/her CDL to operate commercial motor vehicles which are:
(4) Used to transport hazardous materials as defined in § 383.5, or
(c) Endorsement testing requirements. The following tests are required for the endorsements contained in paragraph (b) of this section:
Title 49 published on 2013-10-01
no entries appear in the Federal Register after this date.