CA Gov't Code Section 8670.25

(a)

A person who, without regard to intent or negligence, causes or permits any oil to be discharged in or on the waters of the state shall immediately contain, clean up, and remove the oil in the most effective manner that minimizes environmental damage and in accordance with the applicable contingency plans, unless ordered otherwise by the Coast Guard or the administrator.

(b)

If there is a spill, an owner or operator shall comply with the applicable oil spill contingency plan approved by the administrator.