California Code, Code of Civil Procedure - CCP § 1573

The State Controller may enter into an agreement to provide information needed to enable another state to determine unclaimed property it may be entitled to escheat if such other state or an official thereof agrees to provide this state with information needed to enable this state to determine unclaimed property it may be entitled to escheat. The State Controller may, by regulation, require the reporting of information needed to enable him to comply with agreements made pursuant to this section and may, by regulation, prescribe the form, including verification, of the information to be reported and the times for filing the reports.