Cal. Revenue and Taxation Code § 60107

(a) For the privilege of purchasing diesel fuel exempt from taxes under paragraph (7) of subdivision (a) of Section 60100, each train operator must make a report to the board showing: (1) The name and permit number of the supplier from whom it purchased undyed diesel fuel and the number of gallons of undyed diesel fuel purchased that is exempt from the tax. (2) Any other information required by the board. (b) Each train operator shall prepare and file with the board a report in the form as prescribed by the board, which may include, but not be limited to, electronic media showing the information in subdivision (a) during each quarterly reporting period. The report shall be filed with the board on or before the last day of the calendar month following the close of the quarterly period to which it relates. To facilitate the administration of this part, the board may require the filing of these reports for other than quarterly periods. Reports shall be authenticated in a form or pursuant to methods as may be prescribed by the board. (c) The board may revoke the train operator’s permit provided for in Section 60106.1 due to the filing of inaccurate or improper reports. (d) All of the administrative provisions of this part relating to a supplier shall be applicable to a train operator.