GOV §17615.4: (a) When a new mandate imposes costs that are funded either by legislation or in local government claims bills, local agencies and school districts may file reimbursement claims as required by Section

(a) When a new mandate imposes costs that are funded either by legislation or in local government claims bills, local agencies and school districts may file reimbursement claims as required by Section 17561, for a minimum of three years after the initial funding of the new mandate. (b) After actual cost claims are submitted for three fiscal years against such a new mandate, the commission shall determine, upon request of the Controller or a local entity or school district receiving reimbursement for the program, whether the amount of the base year entitlement adjusted by changes in the deflator and workload accurately reflects the costs incurred by the local agency or school district. If the commission determines that the base year entitlement, as adjusted, does accurately reflect the costs of the program, the commission shall direct the Controller to include the program in the State Mandates Apportionment System. (c) The Controller shall make recommendations to the commission and the commission shall consider the Controller’s recommendations for each new mandate submitted for inclusion in the State Mandates Apportionment System. All claims included in the State Mandates Apportionment System pursuant to this section are also subject to the audit provisions of Section 17616.