California Code, Welfare and Institutions Code - WIC § 10967

At the time of the hearing the recipient has a right to raise the adequacy of the county's notice of action as an issue. If the administrative law judge determines that adequate notice was provided, the recipient shall agree to discuss the substantive issue or issues or the case shall be dismissed. If the administrative law judge determines that adequate notice was not provided, the case will be postponed unless the recipient waives the adequate notice requirement and agrees to discuss the substantive issue or issues at the hearing. If the notice was not adequate and involved termination or reduction of aid, retroactive action shall be taken by the county to reinstate aid pending.