Final answer:
According to Illinois vehicle law, a person must report a motor vehicle accident involving personal injury no later than 24 hours after the accident at a police station or sheriff's office.
Step-by-step explanation:
Under Illinois vehicle law, if an individual is involved in a motor vehicle accident that results in personal injuries, they are required to report the accident to a police station or sheriff's office as soon as possible. The report should be made no later than 24 hours after the accident. If the individual fails to report within this time frame, they may face legal consequences, and it is of the utmost importance to adhere to this rule to ensure that all parties involved receive the appropriate attention and that legal protocols are followed.