Cal. Pub. Util. Code § 3299.100
(b) Any agreement entered into on or after the effective date of this chapter by a property insurer to sell, assign, or transfer, in whole or in part, to a third-party entity, a right of subrogation, reimbursement, or recovery, as applicable, including a right to recover attorney fees, resulting from a wildfire that is ignited on or after the effective date of this chapter and that destroys 1,000 or more structures is subject to all of the following:
(4) If the large electrical corporation rejects the offer made, or fails to reach an agreement within 30 days, pursuant to paragraph (2), the property insurer and the third-party entity may enter into an agreement for the sale, assignment, or transfer of the right under either of the following conditions:
(c)
(1) Any agreement and exchange of information, including the offers made or documentation or other evidence submitted for purposes of reviewing, approving, or denying offers and any acceptance or rejection of an offer made to or by a large electrical corporation, pursuant to subdivision (b) shall be subject to a nondisclosure agreement and shall not be disclosed unless any of the following applies:
(2) Any agreement and exchange of information, including an offer made or documentation or other evidence submitted for purposes of reviewing, approving, or denying offers and any acceptance or rejection of an offer made to an electrical corporation, pursuant to subdivision (b) shall not be admissible, and shall not be used, subject to discovery or compulsion, in any proceeding, including civil litigation, except for a judicial or administrative proceeding involving either of the following: