Gov. Code, § 22970.87

(a) If a person becomes entitled to a distribution from the plan that constitutes an eligible rollover distribution within the meaning of paragraph (31) of subsection (a) of Section 401 of Title 26 of the United States Code, the person may elect under terms and conditions established by the board to have the eligible rollover distribution or a portion thereof paid directly to a plan that constitutes an eligible retirement plan within the meaning of paragraph (31) of subsection (a) of Section 401, as specified by that person. Upon the exercise of the election by a person with respect to a distribution or a portion thereof, the distribution by the plan of the amount so designated, once distributable under the terms of the plan, shall be made in the form of a direct rollover to the eligible retirement plan so specified.

(b) Notwithstanding any other provision of this part or Part 3 (commencing with Section 20000), a participant may at any time, in writing, authorize the board to apply any or all of the participant’s account to payment of any contributions required as a member of the system or payable to the system at the option of the member pursuant to any provision of Part 3 (commencing with Section 20000), except the normal monthly contributions required in Article 1 (commencing with Section 20671) of Chapter 8 of Part 3. Any distribution or transfer made pursuant to this subdivision shall comply with applicable provisions of Title 26 of the United States Code.