Cal. Gov. Code § 27000.7

(a) No person shall be eligible for election or appointment to the office of county treasurer, county tax collector, or county treasurer-tax collector of any county unless that person meets at least one of the following criteria: (1) The person has served in a senior financial management position in a county, city, or other public agency dealing with similar financial responsibilities for a continuous period of not less than three years, including, but not limited to, treasurer, tax collector, auditor, auditor-controller, or the chief deputy or an assistant in those offices. (2) The person possesses a valid baccalaureate, masters, or doctoral degree from an accredited college or university in any of the following major fields of study: business administration, public administration, economics, finance, accounting, or a related field, with a minimum of 16 college semester units, or their equivalent, in accounting, auditing, or finance. (3) The person possesses a valid certificate issued by the California Board of Accountancy pursuant to Chapter 1 (commencing with Section 5000) of Division 3 of the Business and Professions Code, showing that person to be, and a permit authorizing that person to practice as, a certified public accountant. (4) The person possesses a valid charter issued by the Institute of Chartered Financial Analysts showing the person to be designated a Chartered Financial Analyst, with a minimum of 16 college semester units, or their equivalent, in accounting, auditing, or finance. (5) The person possesses a valid certificate issued by the Treasury Management Association showing the person to be designated a Certified Cash Manager, with a minimum of 16 college semester units, or their equivalent, in accounting, auditing, or finance.

(b) This section shall only apply to any person duly elected or appointed as a county treasurer, county tax collector, or county treasurer-tax collector on or after January 1, 1998.