Cal. Gov't Code § 8670.9

(a) The administrator shall enter into discussions on behalf of the state with the States of Alaska, Hawaii, Oregon, and Washington, for the purpose of developing interstate agreements regarding oil spill prevention and response. The agreements shall address, including, but not limited to, all of the following:
1. (1) Coordination of vessel safety and traffic.
2. (2) Spill prevention equipment and response required on vessels and at facilities.
3. (3) The availability of oil spill response and cleanup equipment and personnel.
4. (4) Other matters that may relate to the transport of oil and oil spill prevention, response, and cleanup.
(b) The administrator shall coordinate the development of these agreements with the Coast Guard, the Province of British Columbia in Canada, and the Republic of Mexico.