Cal. Rev. & Tax. Code § 5906
(a) The advocate shall undertake, to the extent not duplicative of existing programs, periodic review of property tax statements and other property tax forms prescribed by the board to determine both of the following:
(b) The advocate shall undertake the review of taxpayer complaints and identify areas of recurrent conflict between taxpayers and assessment officers. This review shall include, but not be limited to, all of the following: