1. a) (T) Double or triple trailers (20 questions).
2. b) (P) Passenger carrying vehicles (16 or more passengers, including the driver) (20 questions). A skills test in a representative vehicle is required. Successful completion of entry-level driver training with passenger endorsement curriculum is required.
3. c) (N) Tank vehicles (20 questions).
4. d) (H) Any vehicle carrying hazardous materials that require placarding (30 questions). Successful completion of entry-level driver training with hazardous material curriculum is required.
5. e) (X) Combination tank vehicle and hazardous materials endorsement. A knowledge test for tank vehicles (N) and hazardous materials (H) must both be successfully completed prior to obtaining this endorsement (20 questions).
6. f) (C) Charter bus driver endorsement. Successfully complete a knowledge test on transporting students grade 12 or below to and from school related functions (20 questions).
7. g) (S) School bus. Successful completion of a written test (20 questions) and a skills test in a representative vehicle is required. Successful completion of entry-level driver training with school bus endorsement curriculum is required.

To obtain any of the following endorsements, a CDL holder must correctly answer 80% of the questions comprising a written knowledge test based on the Illinois Vehicle Code and the federal Commercial Motor Vehicle Safety Act of 1986 (49 U.S.C. 31305). Persons applying for any of the following endorsements, excluding a hazardous materials, passenger (P), or school bus (S) endorsement, who hold a valid CDL or a CDL expired for less than 12 months, issued by another state with the endorsement for which they are making application are exempt from this Section. A person applying for a passenger (P) and school bus (S) endorsement who holds a valid CDL or a CDL expired within 30 days or less issued by another state and with a (S) endorsement and a passenger (P) endorsement is exempt from the passenger (P) and school bus (S) endorsement written test. An applicant for a CLP may obtain a Tank (N), Passenger (P) or School Bus (S) endorsement once the applicant has taken and passed the knowledge test for each endorsement.

(Source: Amended at 47 Ill. Reg. 7791, effective May 17, 2023)