Ind. Code § 36-1-12-11

Sec. 11. (a) The board must, within sixty (60) days after the completion of the public work project, file in the division of fire and building safety a complete set of final record drawings for the public work project. However, this requirement does not apply to a public work project constructed at a cost less than one hundred thousand dollars ($100,000). In addition, the filing of the drawings is required only if the project involves a public building.

(b) The division of fire and building safety shall provide a depository for all final record drawings filed, and retain them for inspection and loan under regulated conditions. The fire prevention and building safety commission may designate the librarian of Indiana as the custodian of the final record drawings. The librarian shall preserve the final record drawings in the state archives as public documents.