A: In Pennsylvania , a conviction for a third offense DUI (Highest Rate) means that you have two previous convictions for DUI within the past 10 years and your BAC in this case is 0.16% or higher or you refused to submit to breath, blood or urine tests. This is graded as a misdemeanor of the first degree and carries a mandatory minimum prison sentence of one year. The maximum term of imprisonment is five years. You also would be required to pay a fine of at least $2,500.00 but not more than $10,000.00. Your license would be suspended for a period of 18 months (and could be revoked altogether if you meet the definition of a "habitual offender"). You also would be require to complete a CRN, D&A evaluation and equip your vehicle(s) with an ignition interlock device for a period of 12 months. There may by other consequences for a conviction of this nature depending upon your driving history and the unique circumstances of your case.