Under ARS 28-1383, a fourth-time DUI in a 7-year period in Arizona is prosecuted as an aggravated DUI, which is a class 4 felony. Penalties include a mandatory minimum of an 8-month prison sentence, $4,000 in fines, and a 1-year driver's license suspension. In addition, the defendant must take traffic survival school as well as an alcohol and drug screening, education, or treatment. The defendant may also have to forfeit the vehicle. And when the defendant resumes driving, an ignition interlock device must be installed for at least 24 months.