For the purposes of this Part, an employee shall be deemed to be grossly negligent when the employee operated the motor vehicle involved in a manner which demonstrates that the employee failed to exercise even a slight degree of ordinary due care to prevent injury to the person or property of another.
Ill. Admin. Code tit. 80, § 3100.800
Amended at 21 Ill. Reg. 10036, effective July 15, 1997