Upon conviction of a second DUI within a 5-year period, the violator's license is suspended for no less than 18 months. See O.C.G.A. 40-5-63(a)(2). During the first 120 days of the 18-month suspension, the violator has no limited driving privileges. See 40-5-64(a)(2). Following the 120-day hard suspension, the violator may apply for a 12-month interlock permit, upon the approval by an accountability court or proof of enrollment in a state-licensed substance abuse treatment program. O.C.G.A. 40-5-64(a)(2). During the final two months of the 18-month suspension, the driver in question can have the interlock restriction removed from their limited permit. O.C.G.A. 40-5-64(e)(2). The sentencing court can waive the interlock requirement in cases of financial hardship, but the violator still must serve the 12-month period designated for interlock under a hard suspension. See O.C.G.A. 42-8-111.