Generally, it is when you violate the conditions of your DUI or Physical Control probation. The same would apply even if you received a reduction to Reckless or Negligent Driving. The sentencing Court will set conditions of your probation such as the following at Sentencing:
Complete an alcohol/drug evaluation and follow recommendation, pay all Court fines and costs, report to probation, not drive a motor vehicle without a valid driver’s license and proof of insurance, no driving with breath or blood alcohol concentration of .08 or greater, no refusal of alcohol test of breath or blood upon reasonable request of a law enforcement, no new criminal violations of law, no alcohol or drug related infractions and Ignition interlock device requirements per DOL.
The most common DUI probation violations: new criminal law violations, failure to do treatment, failure to do victims panel, failure to report to probation, driving without a valid license/insurance and positive UA’s, among many others.
You should always consult with a DUI attorney before going to the Court Hearing. It is usually a good idea to have an attorney with you.