Sec. 4. The interlocal agreement that establishes a commission must provide the following:
(1) The geographic boundaries of the territory over which the commission has jurisdiction.
(2) That the purpose of the commission is the exercise of local planning and zoning functions.
(3) The composition, selection, and terms of members for the commission.
(4) The methods to be used for adopting, enforcing, and administering commission ordinances.
(5) The methods of financing the commission.
(6) Any other matters that the executives desire to include that are pertinent to the purposes of the commission.