California Code
ARTICLE 5 - Employee Benefits and Retirement System
Section 66540.63.

66540.63. The board may classify and determine the officers and employees who shall be included as members in the retirement system and may change the classification from time to time. Membership of all officers and employees so classified and included in the retirement system is compulsory.

(Added by Stats. 2007, Ch. 734, Sec. 2. Effective January 1, 2008.)