Indiana Code Title 36. Local Government § 36-6-6-4

Sec. 4. (a) Except as provided in subsections (b) and (c), two (2) members of the legislative body constitute a quorum.

(b) Before January 1, 2017, four (4) members of the legislative body in a county containing a consolidated city constitute a quorum.  After December 31, 2016, three (3) members of the legislative body in a county having a consolidated city constitute a quorum.

(c) This subsection applies to a township government that:

A majority of the members of the township legislative body constitute a quorum.  If a township legislative body has an even number of members, the township executive shall serve by virtue of office as a member of the township legislative body for the purpose of casting the deciding vote to break a tie.

(d) For townships not described in subsection (c), the township executive shall serve by virtue of office as a member of the township legislative body for the purpose of casting the deciding vote to break a tie.  However, the township executive may not vote to break a tie on the adoption of an ordinance to increase the township executive's compensation (as defined in section 10 of this chapter).