Sec. 5. (a) As used in this chapter, "public agency" means:
(1) a state agency (as defined in IC 4-13-1-1);
(2) a unit (as defined in IC 36-1-2-23);
(3) a body corporate and politic created by state statute;
(4) a school corporation (as defined in IC 20-26-2-4); or
(5) another governmental unit or district with eminent domain powers.
(b) The term does not include a state educational institution.