Indiana Code Title 9. Motor Vehicles § 9-21-12-4

Sec. 4. (a) The state school bus committee established by IC 20-27-3-1 shall adopt and enforce rules that are consistent with this chapter to govern the design and operation of all school buses used for the transportation of school children that are:

in Indiana.  Rules adopted under this section shall by reference be made a part of a contract between a private school bus company and a school corporation.

(b) Each school corporation, the school corporation's officers and employees, and every person employed under contract by a school district is subject to the rules adopted under this section.