(1) A retired PERS member who returns to PERS-covered employment of any type less than 90 days following termination of employment is no longer a retired PERS member and is no longer eligible to receive a retirement benefit.

(a) The member's retirement benefit will be stopped effective the month the member returns to PERS-covered employment.

(b) The member will become an active PERS member, ineligible to receive a PERS retirement benefit.