CA Rev & Tax Code Section 43807

The fee imposed on surface transporters of hazardous materials pursuant to Section 7714.5 of the Public Utilities Code shall be administered and collected by the board in accordance with this part and Part 30 (commencing with Section 55001) of Division 2 of this code, and shall be due and payable as follows:

(a)

The fee to be paid by motor carriers is due and payable on the last day of December for each state fiscal year.

(b)

The fee to be paid by railroads is due and payable within 30 days from the date of assessment and the feepayer shall deliver a remittance of the amount of the assessed fee to the office of the board within that 30-day period.