Indiana Code Title 8. Utilities and Transportation § 8-22-4-1

Sec. 1. (a) Governmental units in each of two (2) party states may combine in the creation of an airport authority for the purpose of jointly supporting and operating an airport terminal and all attached properties.  The governmental units are not limited as to number, character, or size, except that the airport authority must be composed of an equal number of members from each party state, designated or appointed by the legislative body of the participating governmental unit.  The federal government may be represented by a nonvoting agent or representative if authorized by federal law.

(b) The airport authority is established when resolutions or ordinances containing identical agreement provisions are duly adopted by the legislative bodies of the governmental units to be combined into the airport authority.  If passage is by resolution, it may be joint or several, but the resolution or ordinance of the combining governmental units must provide for the number of members, the residence requirements of the members, the length of term of the members, and the appointment of an additional member by the governor of each party state.  If the member appointed by the governor is selected from the membership or staff of the aeronautics commission of the state, there is no limitation as to place of residence, and the length of tenure of office is at the pleasure of the governor.

(c) The respective members of the airport authority, except any member representing the federal government, are each entitled to one (1) vote.  An action of the membership of the airport authority is official only if taken at a meeting in which a majority of the voting members from each party state are present and a majority of those from each state concur.  An action that does not comply with these requirements may be ratified within thirty (30) days by the concurrence of a majority of the members of each party state.  In the absence of a member, his vote may be cast by another representative or member of his state if the representative casting the vote has a written proxy in the proper form required by the airport authority.