Cal. Fam. Code § 17702

(a) The department shall assess, at least once every three years, each county’s compliance with federal and state child support laws and regulations in effect for the time period being reviewed, using a statistically valid sample of cases. Counties found to be out of compliance shall be assessed annually, until they are found to be in compliance. The information for the assessment shall be based on reviews conducted and reports produced by either state or county staff, as determined by the department.
In addition, in order to meet federal self-assessment requirements, the department shall conduct an annual assessment of the state’s compliance, using a statistically valid statewide sample of cases.
(b) A county shall be eligible for the state incentives under Section 17704 only if the department determines that the county is in compliance with all federal and state laws and regulations or if the county has a corrective action plan in place that has been certified by the department pursuant to this subdivision. If a county is determined not to be in compliance the county shall develop and submit a corrective action plan to the department. The department shall certify a corrective action plan if the department determines that the plan will put the county into compliance with federal and state laws and regulations. A county shall be eligible for state incentives under Section 17704 only for any quarter the county remains in compliance with a corrective action plan that has been certified by the department.
(c) Counties under a corrective action plan shall be assessed on a quarterly basis until the department determines that they are in compliance with federal and state child support program requirements.