Cal. Gov. Code § 53151

Any person who is under the influence of an alcoholic beverage or any drug, or the combined influence of an alcoholic beverage and any drug, whose negligent operation of any boat or vessel caused by that influence proximately causes any incident resulting in an appropriate emergency response, and any person whose intentionally wrongful conduct proximately causes any incident resulting in an appropriate emergency response, is liable for the expense of an emergency response by a public agency to the incident.