Indiana Code Title 36. Local Government § 36-9-25-4

(1) If the department is established under section 1(a) of this chapter, the initial terms are one (1), two (2), and three (3) years for the first three (3) commissioners.  If additional commissioners are appointed, their initial terms are four (4) years.

(2) If the department is established under section 1(b) of this chapter, the initial terms of the two (2) appointed commissioners are four (4) and three (3) years respectively.  However, if a third commissioner has also been appointed, the commissioner's initial term is two (2) years.