Cal. Welf. & Inst. Code § 6715

The court shall inquire into the financial condition of the parent, guardian, or other person charged with the support of any person committed as mentally retarded person, and if it finds him able to do so, in whole or in part, it shall make a further order, requiring him to pay, to the extent the court considers him able to pay, the expenses of the proceedings in connection with the investigation, detention, and commitment of the person committed, and the expenses of his delivery to the institution, and to pay to the county, at stated periods, such sums as the court deems proper, during such time as the person remains in the institution or on leave of absence to a licensed hospital, facility or home for the care of such persons. This order may be enforced by such further orders as the court deems necessary, and may be varied, altered, or revoked in its discretion.

The court shall designate some county officer to keep a record of such payments ordered to be made, to receive, receipt for, and record such payments made, to pay over such payments to the county treasurer, to see that the persons ordered to make such payments comply with such orders, and to report to the court any failure on the part of such persons to make such payments.