The way you've written your question is confusing, as it seems to combine several issues. I'm assuming you were granted a Prayer for Judgment Continued (PJC) for aiding & abetting charges within the last three years. You've selected a number of DUI related tags for your question, but you did not mention anything about DUI charges, asking only when the PJC will expire. To answer that question, you are correct in that a PJC will fall off your record after three years if there is no other violation. If the PJC is driving related, that is when your insurance rates would decrease as well. However, if you are facing any DUI charges, a PJC cannot help you at all.
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If you got a PJC then you should not have had any insurance increases unless it was your third in a five year period. But it never falls off your record. It is a conviction without a Judgement entered. Thus it is a conviction, but no sentence.
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