The Illinois Class C application is a document used for applying for a license to operate a motor vehicle in the state of Illinois. It is an application form for a driver's license, state ID, or a learner's permit. There are three types of Illinois Class C applications: 1. The Illinois Driver's License Application, which is used to apply for an Illinois driver's license. 2. The Illinois State Identification Card Application, which is used to apply for an Illinois State Identification card. 3. The Illinois Learner’s Permit Application, which is used to apply for an Illinois learner’s permit.