Firearms and Ammunition - As introduced, authorizes a county legislative body to elect not to permit persons within the county to lawfully carry a handgun without a handgun carry permit by passage of a resolution; requires a county that has passed such a resolution to provide notice to persons present within the county by posting notice of the resolution in conspicuous public locations throughout the county. - Amends TCA Title 39, Chapter 17, Part 13.

SB 43 allows Tennessee counties to ban handgun carry without permits within their borders by passing a resolution. If a county adopts such a resolution, it must post clear notices in public areas to inform residents and visitors. The bill directly affects county governments (which can choose to implement the ban) and people within those counties (who would then need a permit to carry handguns). It modifies existing law to remove the exception for permitless carry in counties that pass such resolutions, while requiring notice posting as a key mechanism. The policy change would give counties local control over handgun carry rules within their boundaries.