Maryland Transportation Section 11-173

      (a)      "Type I school vehicle" means a school vehicle that:

            (1)      Is designed and constructed to carry passengers;

            (2)      Is either of the body-on-chassis type construction or integral type construction; and

            (3)      Has a gross vehicle weight of more than 15,000 pounds and provides a minimum of 13 inches of seating space per passenger.

      (b)      "Type I school vehicle" does not include any bus operated by a common carrier under the jurisdiction of a State, regional, or federal regulatory agency or operated by the agency itself.