Cal. Ins. Code § 1767
A resident surplus line broker at all times shall maintain in good faith an office in this state and if he or she maintains more than one surplus line office in this state, he or she shall designate one of them as his or her principal surplus line office in this state and shall notify the commissioner of that designation. He or she shall report to the commissioner the addresses of all surplus line offices maintained by him or her in this state and any change in location of any of those offices. A nonresident surplus line broker at all times shall maintain in good faith an office in the state or territory of the United States in which he or she is licensed as a resident surplus line broker, and if he or she maintains more than one surplus line office in that state, he or she shall designate one of them as his or her principal surplus line office in that state and shall notify the commissioner of the designation. A resident licensee shall report to the commissioner the addresses of all surplus line offices maintained in this state and any change in location of any of those offices. Nonresident licensees shall report to the commissioner the addresses of all surplus line offices maintained in the state or territory of the United States in which the resident surplus line license is maintained and any change in location of any of those offices.
Ca. Ins. Code § 1767