Once the 18 months has passed, you cannot be held to answer for the probation violation. However, if the motion to revoke your probation is filed the day before your probation ends, then it does not matter how much time is remaining, you can be sentenced for the full term. Until that 18th month passes, they can still file a motion to revoke and pick you up on the violations.
Once the 18 months of probation has passed the file is closed and the court no longer has jurisdiction (assuming that there is no bench warrant outstanding). Once probation closes and the file is closed the court no longer has jurisdiction and therefore you have nothing to violate.
DISCLAIMER: This answer is provided for general educational purposes only. By using or participating in this site you agree and understand that there is no attorney client relationship between you and the attorney responding, and no attorney-client confidentiality. The law changes frequently, and varies from jurisdiction to jurisdiction. The information provided in this answer is general in nature and may not apply to the factual circumstances described in your question. The applicable law and the appropriate answer may be different in the State or States where the relevant facts occurred. For a definitive answer you should seek legal advice from an attorney who (1) is licensed to practice in the state which has jurisdiction; (2) has experience in the area of law you are asking about, and (3) has been retained as your attorney for representation or consultation. Your question and the attorney’s answer may be used for promotional or educational purposes.
DUI DUI defense DUI as a criminal offense DUI sentence DUI charges DUI arrest DUI probation Criminal defense Criminal charges Misdemeanor crime Crimes against society Criminal charges for probation violation Defenses for criminal charges Criminal arrest Criminal court Criminal sentencing Warrants and criminal charges Probation for criminal conviction