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 Do I have to participate in the DROP? 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? 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?