Nothing in this Ordinance or in any rules, regulations or orders issued pursuant to this Ordinance shall be deemed to restrict or regulate or to authorize any unit of government, legislative body, plan commission or board of zoning appeals now or hereafter established, to restrict or regulate the exercise of the power of imminent domain by the State of Indiana or by any state agency, or the use of property owned or occupied by the State of Indiana or any state agency.  As used in this section, the term "state agency" shall mean and include all state agencies, boards, commissions, departments, and institutions, including state universities of the State of Indiana.