Indiana Code Title 36. Local Government § 36-9-28-12

Sec. 12. (a) A board of directors appointed under this chapter consists of three (3) directors, who must own land assessed for the construction of the project.  One (1) of the directors must be a resident of the municipality affected by the improvement, and two (2) of the directors must be residents of an unincorporated area.

(b) One (1) of the original directors shall be appointed for a term of one (1) year, one (1) for a term of two (2) years, and one (1) for a term of three (3) years.  After the expiration of the original terms, all directors shall be appointed for terms of three (3) years.

(c) The appointing authority shall fill any vacancy on the board of directors by appointment for the remainder of the unexpired term.