Harbors and Navigation Code § 663
ARTICLE 1. Operation and Equipment
Every peace officer of this state or of any city, county, city and county, or other political subdivision of the state shall enforce this chapter and any regulations adopted by the department pursuant to this chapter and in the exercise of that duty shall have the authority to stop and board any vessel subject to this chapter, where the peace officer has probable cause to believe that a violation of state law or regulations or local ordinance exists.