Cal. Ins. Code § 1031
Mutual debts or mutual credits, whether arising out of one or more contracts between the person in liquidation under Section 1016 and any other person, shall be set off and the balance only shall be allowed or paid, except with respect to any of the following obligations as described in subdivisions (a) to (d), inclusive:
(d) The obligations between the other person and the person in liquidation arise from business where either the person in liquidation or the other person has assumed risks and obligations from the other party and then has ceded back to that party substantially the same risks and obligations.
Notwithstanding the foregoing, a set-off of amounts due on obligations arising from those contracts shall be allowed if the balance arises from contracts that were entered into, renewed, or extended with the express written approval of the commissioner.