If I am not mistaken this whole thing started because Roman wanted to clear up an issue he had because he would not clear an aircraft on his IFR flight plan because it listed an equipment code that was not valid for IFR flight....
what I am about to say is NOT about who is right and wrong. I am no expert, I am just a real world PPL studying for his IFR rating...
(Accoding to my IFR theory material, an A means that the aircraft is equipped with DME and a Mode C Xpnder, for VOR/ LORAN etc there are other codes)
I would like to remind Roman that this is a GAME and Simulation. And after reading all of this, I would be VERY hesitant to fly under your control for fear of being delayed for meaningless, pointless corrections of a flight plan that in NO WAY effect VATSIMs enviroment...
we are not talking about somone who filed to fly to KJFK with a TALMI departure.
we are talking about somthing that 90% of vatsim flyers know NOTHING about and does not require you as a DEL to deny a IFR flight plan.
You have been answered here and on the VATSIM forums MANY times.
its time to let this die.