California Code, Government Code - GOV § 17551

(a) The commission, pursuant to the provisions of this chapter, shall hear and decide upon a claim by a local agency or school district that the local agency or school district is entitled to be reimbursed by the state for costs mandated by the state as required by Section 6 of Article XIII B of the California Constitution.

(b) Except as provided in Sections 17573 and 17574, commission review of claims may be had pursuant to subdivision (a) only if the test claim is filed within the time limits specified in this section.

(c) Local agency and school district test claims shall be filed not later than 12 months following the effective date of a statute or executive order, or within 12 months of incurring increased costs as a result of a statute or executive order, whichever is later.

(d) The commission, pursuant to the provisions of this chapter, shall hear and decide upon a claim by a local agency or school district filed on or after January 1, 1985, that the Controller has incorrectly reduced payments to the local agency or school district pursuant to paragraph (2) of subdivision (d) of Section 17561.