Cal. Welfare and Institutions Code § 17001.6

(a) To the extent not inconsistent with federal law, a county may require the legal sponsor of a person who is not a citizen or national of the United States general assistance recipient to sign a written agreement to repay any aid provided to the person during the period of time during which the sponsor has agreed, in writing, to provide for the person who is not a citizen or national of the United States. (b) Upon request of the board of supervisors, the district attorney or any other civil legal officer may maintain an action against the legal sponsor of a person who is not a citizen or national of the United States to recover, for the county, the aid provided the person during the period described in subdivision (a) and to secure an order requiring payment of any sums that may become due in the future. (c) For purposes of enforcing this section, a county may seek and employ all remedies otherwise authorized by this part. (d) This section shall not be construed to authorize a county to penalize a recipient of general assistance, or to otherwise deny, curtail, or modify the general assistance provided a recipient unless otherwise provided in the county general assistance program standards and requirements.