Cal. Bus. & Prof. Code § 6156
(a) No attorney licensed or otherwise authorized to practice in this state shall share legal fees directly or indirectly with an out-of-state alternative business structure unless all of the following apply:
(b) A violation of this section shall constitute cause for the imposition of discipline by the State Bar of California and shall subject the attorney to the following penalties:
(c)
(d) This section shall not apply to any arrangement for the sharing of legal fees if both of the following conditions are satisfied:
(e) This section shall not apply to a contract in which all of the following are satisfied: