Cal. Lab. Code § 6326

Every person who, after such notice is attached as provided in Section 6325, enters any such place of employment, or uses or operates any such place of employment, machine, device, apparatus, or equipment before it is made safe and the required safeguards or safety appliances or devices are provided, or who defaces, destroys or removes any such notice without the authority of the division, is guilty of a misdemeanor punishable by a fine of up to one thousand dollars ($1,000), or up to one year in the county jail, or both.