California Code, Vehicle Code - VEH § 3050.2

(a) Obedience to subpoenas issued to compel attendance of witnesses, or the production of books, records, papers, and other documents at the proceeding or hearing, may be enforced by application to the superior court as set forth in Article 2 (commencing with Section 11180) of Chapter 2 of Part 1 of Division 3 of Title 2 of the Government Code.

(b) Compliance with discovery procedures authorized pursuant to subdivision (b) of Section 3050.1 may be enforced by application to the executive director of the board. The executive director may, at the direction of the board, upon a showing of failure to comply with authorized discovery without substantial justification for that failure, dismiss the protest or petition or suspend the proceedings pending compliance. The executive director may, at the direction of the board, upon a failure to comply with authorized discovery without substantial justification for that failure, require payment of costs incurred by the board, as well as attorney's fees and costs of the party who successfully makes or opposes a motion to compel enforcement of discovery. Nothing in this section precludes the executive director from making application to the superior court to enforce obedience to subpoenas or compliance with other discovery procedures authorized pursuant to subdivision (b) of Section 3050.1.