Ind. Code § 11-12-5.5-4

Sec. 4. If the participating entities determine that the regional jail agreement entered into under this chapter shall be administered by a separate legal entity as authorized by IC 36-1-7-3(a)(5)(A) or by a joint board as authorized by IC 36-1-7-3(a)(5)(B), the county sheriff of each county participating in the agreement (or the county sheriff's designee) must be included as a member on the governing board of the separate legal entity or as a member of the joint board.