California Code
ARTICLE 4 - California Public Employees Pension Reform Act of 2013
Section 7522.15.

7522.15. Except as provided in subdivisions (d) and (e) of Section 7522.02, each public employer and each public retirement system that offers a defined benefit plan shall offer only the defined benefit formulas established pursuant to Sections 7522.20 and 7522.25 to new members.

(Added by Stats. 2012, Ch. 296, Sec. 15. (AB 340) Effective January 1, 2013.)