Indiana Code Title 25. Professions and Occupations § 25-4-1-29

Sec. 29.  (a) Except as hereinafter otherwise provided, the state of Indiana, nor any board, department or agency thereof, nor any county, city, town, township, school corporations, or other political subdivision of this state shall engage in the construction, alteration, or maintenance of any public building or public work involving the practice of architecture for which plans, specifications and estimates have not been prepared, certified, and sealed by, and the construction, alteration, or maintenance executed under the direct supervision of an architect, which architect shall be the holder in good standing of a certificate of registration from the board of registration for architects and landscape architects entitling him to practice architecture in this state.

(b) No official of this state, nor of any city, town, county, township, or school corporation thereof, charged with the enforcement of any law, ordinance, or rule relating to the construction or alteration of buildings or structures, shall use or accept or approve any plans or specifications that have not been prepared by, or under the supervision of, and certified by a registered architect.  This subsection shall not apply if such plans or specifications have been prepared by, or under the supervision of and certified by a professional engineer who is registered under the laws of the state of Indiana.  This subsection shall not apply to the construction or alteration of any building or structures specifically exempted from the rules of the fire prevention and building safety commission or specifically exempted from the fire prevention and building safety commission requirements for preparation of such plans and specifications by registered architects or registered engineers.  This section shall not be construed as to abridge, or otherwise affect, the powers of the fire prevention and building safety commission, or any other state board or department, to issue rules governing the safety of buildings or structures.