What is the penalty for not wearing a seatbelt in Illinois?

The penalty for not wearing a seatbelt in Illinois for a first offense is indeed a fine of $25. This reflects the state's effort to promote safety on the roads by encouraging the use of seatbelts. The relatively low fine for a first offense serves as a reminder for drivers and passengers about the importance of seatbelt use, rather than a harsh punishment.

For context, the other options do not accurately represent the current seatbelt enforcement laws in Illinois. A warning with no fine may be a common practice for minor infractions, but it does not apply to seatbelt violations where a financial penalty is involved. A fine of $100 would not typically be issued for a first offense, as Illinois law designates lower penalties for initial violations. Similarly, a fine of $50 for multiple offenses is not applicable since the standard penalty does not increase with subsequent violations in a straightforward manner, but rather can vary depending on circumstances and previous offenses.