Gov. Code, § 31680.2

(a) Any person who has retired may be employed in a position requiring special skills or knowledge, as determined by the county or district employing them, for a period of time not to exceed 90 working days or 720 hours, whichever is greater, in any one fiscal year or any other 12-month period designated by the board of supervisors and may be paid for that employment. That employment shall not operate to reinstate the person as a member of this system or to terminate or suspend their retirement allowance, and no deductions shall be made from their salary as contributions to this system.

(b) (1) This section shall not apply to any retired person who is otherwise eligible for employment under this section if, during the 12-month period prior to an appointment described in this section, that retired person receives unemployment insurance compensation arising out of prior employment subject to this section with the same employer.

(2) A retired person who accepts an appointment after receiving unemployment insurance compensation as described in this subdivision shall terminate that employment on the last day of the current pay period and shall not be eligible for reappointment subject to this section for a period of 12 months following the last day of employment.

(3) Beginning January 1, 2013, if any provision of this section conflicts with the California Public Employees’ Pension Reform Act of 2013, the provisions of that act shall prevail, except that the limit on postretirement employment provided in subdivision (a) to the greater of 90 working days or 720 hours shall remain effective.