49 CFR §384.215

1. (a)General rule. The State must disqualify from operating a CMV each person who is convicted, as defined in § 383.5 of this subchapter, in any State or jurisdiction, of a disqualifying offense specified in items (1) through (8) of Table 1 to § 383.51 of this subchapter, for no less than one year.
2. (b)Special rule for hazardous materials offenses. If the offense under paragraph (a) of this section occurred while the driver was operating a vehicle transporting hazardous materials as defined in § 383.5, the State shall disqualify the person for no less than three years.