A driver wants to add a Passenger endorsement to an existing Illinois CDL. Which sequence best matches Illinois requirements?

1. Pay the correction fee and begin carrying passengers immediately
2. Pass required written testing, receive the appropriate CLP with P endorsement, hold it at least 14 days, complete ELDT as required, and pass passenger skills/drive testing
3. Complete a hazmat threat assessment and skip the drive test
4. Take only the general knowledge test because the driver already has a CDL