Indiana Code Title 20. Education § 20-23-11-1

Sec. 1. If a school trustee or board of school trustees of any school corporation in Indiana that is adjacent to a school corporation of another state believes the best interests of the public schools can be promoted by purchasing school grounds, repairing or erecting a schoolhouse or schoolhouses, and maintaining a school jointly between the two (2) adjacent school corporations, the school trustee or school trustees of the school corporation of Indiana so situated may enter into an agreement with the school authorities of the adjacent school corporation to:

if, in the judgment of the school trustee or trustees of Indiana, the best interests of the public school can be promoted by doing so.