California Code, Education Code - EDC § 24102

(1) While the member is employed and has performed creditable service within the four months previous to application, or while the member is on a compensated leave of absence.

(2) While the member is physically or mentally incapacitated for performance of service and the incapacity has been continuous from the last day of actual performance of service for which compensation is payable to the member.

(3) While the member is on a leave of absence without compensation, granted for reason other than mental or physical incapacity for performance of service, and within four months after the last day of actual performance of service for which compensation is payable to the member, or within 12 months of that date if the member was on an employer-approved leave to study at an approved college or university.

(4) Within four months after the termination of the member's employment subject to coverage under the Defined Benefit Program, if the application was not made under paragraph (2) and was not made more than four months after the last day of actual performance of service for which compensation is payable to the member.