Cal. Government Code § 31694.6

(a) Notwithstanding any provision to the contrary in this article, if the Post-Employment Benefits Trust Account established under Section 31694 is established as a part of the retirement fund, then that account shall be established for the sole purpose of providing health benefits for retired members, their spouses, and dependents, and shall comply with all requirements, including the limitations on contributions, of Section 401(h) of Title 26 of the United States Code, as applicable. (b) The board of supervisors or the board of retirement shall take any actions necessary or appropriate to ensure that the program provided by this section complies with all applicable federal and state income tax laws, including, but not limited to, establishing rules and procedures for establishing and maintaining an account under Section 401(h) of Title 26 of the United States Code. (c) If the Post-Employment Benefits Trust Account is established under Section 31694, assets shall not be transferred or otherwise paid from the funds held by the retirement system for retirement benefits to a medical benefits account. Assets shall not be transferred or otherwise paid from a medical benefits account to the funds held by the retirement system for retirement benefits.