Cal. Harb. & Nav. Code § 263

Every person in charge of a steam vessel navigating any of the waters of this State which is used for the conveyance of passengers, and every person in charge of the boiler or other apparatus for the generation of steam who, for the purpose of increasing speed or excelling any other vessel in speed, permits to be created an undue or an unsafe quantity of steam, incurs a penalty of five hundred dollars.