Ind. Code § 36-9-29.1-6
(b) The adoption or filing of any specifications covering all or parts of the project and details of other matters is optional with the board, and it may also receive and file alternate plans and specifications, submitted by any person for all or any parts of the project. The board may, at the final hearing, adopt all or any of these materials in place of the board's plans and specifications.
As added by Acts 1982, P.L.77, SEC.24. Amended by P.L.27-1986, SEC.6.