CA Gov't Code Section 8670.37.55

(a)

An owner or operator of more than one tank vessel, vessel carrying oil as a secondary cargo, nontank vessel, or facility shall only be required to obtain one certificate of financial responsibility for all of those vessels and facilities owned or operated.

(b)

If a person holds a certificate for more than one tank vessel, vessel carrying oil as a secondary cargo, nontank vessel, or facility and a spill or spills occurs from one or more of those vessels or facilities for which the owner or operator may be liable for damages in an amount exceeding 5 percent of the financial resources reflected by the certificate, as determined by the administrator, the certificate shall immediately be considered inapplicable to any vessel or facility not associated with the spill. In that event, the owner or operator shall demonstrate to the satisfaction of the administrator the amount of financial ability required pursuant to this article, as well as the financial ability to pay all damages that arise or have arisen from the spill or spills that have occurred.