IN Code § 36-7.7-3-1 (2021)
2021 Indiana Code|Title 36. Local Government|Article 7.7. Central Indiana Regional Development Authority|Chapter 3. Development Authority and Board|36-7.7-3-1. Establishment; Members

Sec. 1. (a) In order to establish a development authority under this article, the fiscal bodies of a combination of any two (2) or more counties or municipalities described in subsection (b) must adopt substantially similar resolutions to adopt a preliminary development plan prepared under section 3 of this chapter for the development authority.(b) A development authority may be established by any of the following:(1) One (1) or more counties and one (1) or more adjacent counties.(2) One (1) or more counties and one (1) or more municipalities in adjacent counties.(3) One (1) or more municipalities and one (1) or more municipalities in adjacent counties.(c) If a development authority is established under subsection (a), the development authority shall promptly notify the Indiana economic development corporation of the establishment of the development authority by submitting a copy of the preliminary development plan to the Indiana economic development corporation.(d) When a county establishes a development authority under subsection (a) with another unit, any municipality in the county does not also become a member of the development authority, unless the fiscal body of the municipality also adopts the preliminary development plan prepared under section 3 of this chapter for the development authority.(e) A county or municipality may become a member of the development authority under this section only if the county or municipality is not a member of a development authority under IC 36-7.6. If a county or municipality is a member of another development authority established under IC 36-7.6, the county or municipality must withdraw its membership in that development authority before the county's or municipality's adoption of a preliminary development plan under subsection (a). A county or municipality may be a member of only one (1) development authority.(f) If not already members, Marion County and the city of Indianapolis are required to join the central Indiana regional development authority if sixty percent (60%) or more of the eligible political subdivisions located within the Indianapolis-Carmel-Anderson Metropolitan Statistical Area as defined by the United States Census Bureau become members of the central Indiana regional development authority. If Marion County and the city of Indianapolis are required to become members of the central Indiana regional development authority under this subsection, Marion County and the city of Indianapolis do not incur any financial obligation because of the fact they have become members of the central Indiana regional development authority. Marion County or the city of Indianapolis can incur a financial obligation in relation to the central Indiana regional development authority only by voluntarily entering into an agreement to undertake the financial obligation.(g) Notwithstanding any other law, any of the following governmental units may immediately withdraw from the development authority to which they belong in order to join the central Indiana regional development authority:(1) The city of Westfield.(2) The city of Carmel.(3) The city of Greenwood.(4) Marion County.As added by P.L.83-2020, SEC.2.