Cal. PROB § 1513.1

(a) Each court or county shall assess (1) the parent, parents, or other person charged with the support and maintenance of the ward or proposed ward, and (2) the guardian, proposed guardian, or the estate of the ward or proposed ward, for court or county expenses incurred for any investigation or review conducted by the court investigator, probation officer, or domestic relations investigator. Subject to Section 68631 of the Government Code, the court may order reimbursement to the court or to the county in the amount of the assessment, unless the court finds that all or any part of the assessment would impose a hardship on the ward or the ward’s estate. A county may waive any or all of an assessment against the guardianship on the basis of hardship. There shall be a rebuttable presumption that the assessment would impose a hardship if the ward is receiving Medi-Cal benefits.

(b) Any amount chargeable as state-mandated local costs incurred by a county for the cost of the investigation or review shall be reduced by any assessments actually collected by the county pursuant to subdivision (a) during that fiscal year.