“School crossing guard” means any person 18 years of age and older or any person under 18 years of age who is being directly supervised by a person at least 18 years of age, acting with or without compensation and who is authorized under Kan. Stat. Ann. § 8-15,104, and amendments thereto, to supervise, direct, monitor or otherwise assist school children at a street or intersection in the vicinity of a school crosswalk or bus stop.