California Code, Government Code - GOV § 31672.1

(a) An employee who has reached 55 years of age has held a position in the county service for 10 years, and on the date of retirement is employed in a temporary, seasonal, intermittent, or part-time position in which the employee has received credit for five full years of service, may be retired upon filing with the board a written application, setting forth the date upon which the employee desires the employee's retirement to become effective. Fifty-five years of age in the preceding sentence may be reduced to 50 years of age in any county by resolution of the board of supervisors if such reduction has also been made under Section 31672.The effective retirement date shall not be either of the following:

(b) This section shall not apply to a member who is subject to the provisions of the California Public Employees' Pension Reform Act of 2013 for all or any portion of their membership in the county retirement system.