May 01, 2017 15:15 Updated Follow To participate, you must be eligible to retire and immediately begin receiving unreduced retirement benefits on the date you enter the DROP. Related articles Who is eligible for the Teachers' Retirement Fund? Is there a limit on how much money I can make after retirement if I return to a PERF- or TRF-covered position? Do I have to participate in the DROP? When do I get my PERF pension benefit? I’m retiring from my PERF-covered position at the end of the month. My employer has agreed to re-hire me in the same job after 30 days. Is this legal?