Section 6628 Of Chapter 7. Appeal Proceedings From California Labor Code >> Division 5. >> Part 1. >> Chapter 7.

. The writ of mandate shall be made returnable at a time and place then or thereafter specified by court order and shall direct the appeals board to certify its record in the case to the court within the time therein specified. No new or additional evidence shall be introduced in such court, but the cause shall be heard on the record of the appeals board, as certified to by it.