Illinois Class S Application Instructions are the instructions for applying for a Class S driver's license in the state of Illinois. This type of license is for non-CDL (Commercial Driver's License) drivers who want to drive a school bus, church bus, or senior citizen transportation vehicle. The application process for an Illinois Class S license requires the applicant to complete an application form, submit the necessary fees, and provide necessary documentation to prove identity and residency. Additionally, the applicant must pass the state's vision and written tests. The two types of Illinois Class S Application Instructions are the Initial Application Instructions for applicants who have never had an Illinois driver's license, and the Renewal Application Instructions for applicants who are renewing an existing Illinois Class S license.