An acd ajourns the case basically and then after 6 months it is dismissed. I am pretty sure during that time it will appear that the case is still pending until the acd is closed. Speak to a lawyer and see if something can be worked out,it's gonna be hard to hide the arrest even with an acd one can never be 100 percent sure. Even thou once the acd is complete it suppose to be like nothing happened. An experinced lawyer is the best person to ask.