(b) Notwithstanding subdivision (a), it is unlawful for the motor carrier or the person who directs the driver to operate a vehicle transporting hazardous material, when that transportation requires a license pursuant to this division, to cause the operation of the vehicle unless the motor carrier holds a valid license for the transportation of hazardous materials. A violation of this subdivision shall be punished as follows:

1. (1) For a first violation, by a fine of not less than two thousand dollars ($2,000).
2. (2) For a second or subsequent violation, by a fine of not less than four thousand dollars ($4,000).