CA Gov't Code Section 21227

(a)

A retired person may serve without reinstatement from retirement or loss or interruption of benefits provided by this system as a member of the academic staff of the California State University, if that service does not exceed a total for all employers of 960 hours in a fiscal year or 50 percent of the hours the member was employed during the last fiscal year of service prior to retirement, whichever is less.

(b)

(1)This section shall not apply to a retired person otherwise eligible to serve without reinstatement from retirement, 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. The retired person shall not be subject to Section 21202 or subdivision (b) of Section 21220.