Cal. HSC § 18403

In any action or proceeding to abate a nuisance in a park, proof of any one of the following facts is sufficient for a judgment or order for the abatement of the nuisance, violation, or operation of the park: (a) A previous conviction of the owner or operator of a violation of this part or a regulation adopted pursuant to this part which constitutes a nuisance or failure on the part of the owner or operator to correct the violation after the conviction. (b) The violation is the basis for the proceeding.