Cal. Gov. Code § 29911

In the resolution providing for the issuance of the bonds, the board may provide for the call and redemption of all or any part of the bonds on any interest payment date prior to their fixed maturity, at their par value plus a specified premium, if any, and accrued interest. The bonds to be called for redemption prior to maturity shall be selected in such manner as the board may provide in said resolution. If a bond is subject to call and redemption a statement to that effect shall be set forth on the face of the bond.