Cal. Gov. Code § 21268
The Controller may make an agreement with one or more financial institutions participating in the Automated Clearing House pursuant to the local rules, and may establish a program, for the direct deposit by electronic fund transfer of the benefits, after any withholding required by law and authorized deductions, of any person entitled to the receipt of benefits from any state retirement system who authorizes the direct deposit thereof by electronic fund transfer into the person's account at the financial institution of his or her choice.
If the Controller does not make an agreement establishing a program for direct deposit by electronic fund transfer of the retirement benefits, the administrative body of any state retirement system may make such an agreement.
Ca. Gov. Code § 21268