Yeah same for the NACES seats we have (a derivative of ACES II if I'm not mistaken?). Three positions in the rear cockpit, SOLO (for if the rear is unoccupied), NORM (aft seat goes out when that crew station initiates, front seat does not), and AFT Initiate (where rear seat can eject both front and back). Our rule is you have to be a qualified F/A-18 or EA-18 pilot or NFO to put the seat in aft initiate. Incentive rides, like this one, are flown in Norm. I'm sure they did the same thing here, with whatever equivalent setting the ACES has..........I did fly with ACES in the F-16, but too many penguins have slipped off the iceberg for me to remember if the mode terminology was the same, but I believe it functioned exactly the same IIRC (in the B models)