Ind. Code § 4-13.5-1-6
Subject to section 8 of this chapter, the commission may not enter into:
(2) a contract for the purchase or sale of materials or supplies;
without complying with IC 4-13-2 and the rules and procedures of the department.
As added by Acts 1977, P.L.31, SEC.1. Amended by P.L.123-2002, SEC.3.