Indiana Code Title 36. Local Government § 36-7-11.2-31

Sec. 31. (a) The rules and regulations of the commission must specify a particular time on a particular day of the week in a particular week of the month for holding regular meetings to consider any matters properly coming before the commission.  Except as provided in subsection (b), the commission shall regularly meet at the designated time, if there is any matter requiring consideration or determination as specified in this chapter.

(b) The commission may designate in the rules and regulations July or August as a vacation month during which the commission will not hold a regular meeting despite the existence of matters requiring consideration or determination.  A person desiring the commission to consider or determine any matter that is within the commission's jurisdiction under this chapter must, at least thirty (30) days before a regular meeting date of the commission upon which the person desires the commission to determine or consider the matter, file with the commission a petition that does the following: