California Code, Financial Code - FIN § 1396

(a) No office of a California state bank that conducts authorized agency activities as agent for an insured depository institution in accordance with this article shall, on that account, be deemed to be an office of the insured depository institution.

(b) For purposes of this division, no insured depository institution that has a California state bank engaged in authorized agency activities as its agent shall on that account be deemed to be transacting business in this state.