California Code, Government Code - GOV § 1157.9

Officers and employees of public agencies may authorize wage and salary deductions for deposit into an account with a state or federal bank or savings and loan association located in this state, or for the purchase of shares in, or the payment of money to, any regularly chartered credit union, or for the purchase of any investment or thrift certificate issued by an industrial loan company licensed by this state.  Auditors, treasurers, and other disbursing officers of any public agency other than a state agency are authorized to recognize and act upon these wage or salary assignments.