California Code, Health and Safety Code - HSC § 1385.06

(b)(1) The plan shall contract with an independent actuary or actuaries consistent with this section.

(2) A filing submitted under this article shall include a certification by an independent actuary or actuarial firm that the rate increase is reasonable or unreasonable and, if unreasonable, that the justification for the increase is based on accurate and sound actuarial assumptions and methodologies. Unless PPACA requires a certification of actuarial soundness for each large group contract, a filing submitted under Section 1385.04 shall include a certification by an independent actuary, as described in this section, that the aggregate or average rate increase is based on accurate and sound actuarial assumptions and methodologies.

(3) The actuary or actuarial firm acting under paragraph (2) shall not be an affiliate or a subsidiary of, nor in any way owned or controlled by, a health care service plan or a trade association of health care service plans. A board member, director, officer, or employee of the actuary or actuarial firm shall not serve as a board member, director, or employee of a health care service plan. A board member, director, or officer of a health care service plan or a trade association of health care service plans shall not serve as a board member, director, officer, or employee of the actuary or actuarial firm.