After ACD dismissal is over?

Law enforcement will have a record of your arrest but you do not have any criminal record. You should go to the court clerk and get a certificate of disposition for $10 as proof that the case was dismissed and sealed.

After the ACD period is over, your case is dismissed and sealed. You can purchase a Certificate of Disposition for $10 from the Clerk's Office if you wish.

I concur with the sentiments of Messrs. Southard and Rothstein. Get the disposition certificate from the court house. Make sure it bears a raised seal and keep it in your lockbox with your will, your passport, your insurance papers, military discharge papers, birth certificate, and other vital documents.