Amends TCA Title 5 and Title 6.

Tennessee HB0365 prohibits municipalities from taking actions that affect tax obligations or costs for real property owners outside their corporate boundaries without county legislative body approval. It also mandates that by July 1, 2029, at least 90% of a county's population must be proportionately represented on joint economic and community development boards, with a mechanism for transitioning to this representation over time. Key provisions include rules for adjusting board membership and ensuring compliance with population representation based on census data.