Cal. Lab. Code § 6324

The application to the superior court accompanied by affidavit showing that such place of employment, machine, device, apparatus, or equipment is being operated in violation of a safety order or standard, or in violation of Section 25910 of the Health and Safety Code, and that such use or operation constitutes a menace to the life or safety of any person employed thereabout and accompanied by a copy of the order or standard applicable thereto is a sufficient prima facie showing to warrant, in the discretion of the court, the immediate granting of a temporary restraining order. No bond shall be required from the division as a prerequisite to the granting of any restraining order.