Ind. Code § 36-9-6.1-5

Sec. 5. Plans, specifications, and contracts for a project proposed under section 4 of this chapter must be prepared, adopted, and let in the manner required by IC 36-9-36, except that the provisions of IC 36-9-36 for remonstrance by resident freeholders do not apply. Separate phases of a project may be included in separate plans and specifications, and the work on separate phases may be done by contract or otherwise, as separate improvements.