Section 22908 Of Chapter 15. Employee Contributions From California Education Code >> Division 1. >> Title 1. >> Part 13. >> Chapter 15.

. (a) Subject to rules prescribed by the board, any member may elect to make annuity deposit contributions for the purpose of providing additional retirement income. However, on and after January 1, 1983, the system shall not accept any annuity deposit contributions.
  (b) Accumulated annuity deposit contributions may be withdrawn as provided in Section 23107.