The Interstate Driver’s License Compact (IDLC) is an agreement between 45 U.S. states to share information about driving-related offenses, including DUI and DWI convictions. The purpose of the IDLC is to improve highway safety and hold drivers accountable for their actions across state lines. The only states that do not belong to the IDLC are Georgia, Massachusetts, Michigan, Tennessee, and Wisconsin. However, some of these states have their own laws to alert a driver's home state about their DUI conviction.