California Code, Harbors and Navigation Code - HNC § 1190.3

(a) There shall be an additional surcharge imposed per each movement of a vessel using pilot services as is necessary and authorized by the board to recover the costs of the pilot associated with a catastrophic event. The surcharge authorized by this subdivision shall be identified as a catastrophic event surcharge on the invoice of the pilot and separately accounted for in the accounting pursuant to Section 1136.

(b) Subdivision (a) only applies if the board identifies that the costs recorded in a catastrophic event memorandum account are attributable to a specifically identifiable catastrophic event. Catastrophic events include, but are not limited to, fire, earthquake, terrorism, act of war, or epidemic, if the event has been declared an emergency or a disaster by a local, state, or federal governmental authority.