Ind. Code § 36-7-11.1-6
(m) Upon the adoption of the historic preservation plan, the commission may at any time identify by appropriate markers any historic areas, structures, and sites designated by the plan, or any historic area properties in the process of restoration under the plan. These markers may be erected on public right-of-ways or, with the consent of the owner, on any subject historic property. These official informational or identification markers, whether permanent or temporary, constitute an exception to any codes and ordinances establishing sign regulations, standards, and permit requirements applicable to the area.
As added by Acts 1982, P.L.77, SEC.6.