In case of snow, sleet, fog, or other adverse weather conditions, or in case the highways are covered with snow or ice, or presence of unusual road and traffic conditions, a driver may be permitted to drive or operate a motor vehicle of the second division, in order to complete his run, for not more than 12 hours in the aggregate following 8 consecutive hours off duty, instead of the limit of 10 hours driving following 8 consecutive hours off duty as provided in Section 11-1419 of the Illinois Vehicle Code.
Ill. Admin. Code tit. 20, § 1250.30