Sec. 174. (a) "Public lawsuit", for purposes of IC 34-13-5, means:
(1) any action in which the validity, location, wisdom, feasibility, extent, or character of construction, financing, or leasing of a public improvement by a municipal corporation is questioned directly or indirectly, including but not limited to suits for declaratory judgments or injunctions to declare invalid or to enjoin the construction, financing, or leasing; and
(2) any action to declare invalid or enjoin the creation, organization, or formation of any municipal corporation.
(b) The definition of "public lawsuit", as used in IC 34-13-5, shall not be construed to broaden any right of action as is validly limited by applicable law.