Code:
expCond="typeOf player != 'USMC_Soldier_Pilot' && typeOf vehicle player == 'A10' && !((vehicle player) isKindOf 'ParachuteBase')";
expActiv="if (player == driver vehicle player) then {player action ['eject',vehicle player]; player groupChat 'You have no permission to fly!'}";
...Auszug aus der mission.sqm...
My prefered solution.