Cal. Gov. Code § 31485.15

In accordance with Section 401(a)(31) of Title 26 of the United States Code, a person who is entitled to a distribution under this chapter that is an eligible rollover distribution may elect to have all or a part of that distribution paid directly to an eligible, specified plan, subject to terms and conditions established by the board. If a person elects to have the eligible rollover distribution paid to an eligible, specified plan, the payment, when it is distributable, shall be made in the form of a direct trustee-to-trustee transfer to the eligible retirement plan.