California Code, Government Code - GOV § 8670.34

(a) The operators or crew of the tank vessel, nontank vessel, or vessel carrying oil as a secondary cargo comply at all times with all orders and directions given by the administrator, or his or her designee, while the tank vessel, nontank vessel, or vessel carrying oil as a secondary cargo is in waters of the state, unless the orders or directions are contradicted by orders or directions of the Coast Guard.

(b) Except for fuel, oil may be transferred to or from the tank vessel, nontank vessel, or vessel carrying oil as a secondary cargo while it is in waters of the state only if permission is obtained for the transfer of oil and one of the following conditions is met:

(c) The tank vessel, nontank vessel, or vessel carrying oil as a secondary cargo shall leave the waters of the state as soon as it may do so without imminent risk of harm to the crew, public safety, or the environment, unless an oil spill contingency plan is approved or made applicable to it under this article.