"School bus" means every bus designed for carrying more than nine passengers that is owned by a public, private or governmental agency or institution of learning and operated for the transportation of children to or from a school session or a school function, or owned by a private person and operated for compensation for the transportation of children to or from a school session or a school function; provided "school bus" does not include a bus operated by a municipally owned transportation system, a mass transit company operating exclusively within the territorial limits of the Park District, or within such limits and the territorial limits of municipal corporations immediately contiguous to the Park District, nor a common passenger carrier certified by the Public Utilities Commission unless such bus is devoted exclusively to the transportation of children to and from a school session or a school function, and "school bus" does not include a van or bus used by a licensed child day-care center or type A family day-care home to transport children from the child day-care center or type A family day-care home to a school if the van or bus does not have more than fifteen children in the van or bus at any time. "Child day-care center" and "type A family day-care home" have the same meanings as in Ohio R.C. 5104.01.
(ORC 4511.01(F), (FFF))