CA Gov't Code Section 1152

Deductions may be requested by employee organizations and bona fide associations from the salaries and wages of their members, as follows:

(a)

Employee organizations may request membership dues, initiation fees, and general assessments, as well as payment of any other membership benefit program sponsored by the organization.

(b)

Bona fide associations may request membership dues and initiation fees. The Controller shall not be required to make any benefit deductions for an employee member whose membership dues are not deducted.