Cal. HSC § 18866.4

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 Part 2.1 (commencing with Section 18200) or a regulation adopted pursuant to this part or Part 2.1 (commencing with Section 18200) that 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.