California Code, Government Code - GOV § 7506.5

The Controller shall make an agreement with one or more financial institutions participating in the Automated Clearing House pursuant to the local rules, and shall 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.