Tennessee Code Title 11. Natural Areas and Recreation § 11-15-106

(a) Sections 11-15-101 -- 11-15-106, insofar as they relate to easements or interests in structures, shall only apply to counties having a population of two hundred thousand (200,000) or more according to the 1970 federal census or any subsequent federal census, it being the finding of the general assembly that redevelopment pressures are greater on historic structures in heavily urbanized areas.

(b) Sections 11-15-101 -- 11-15-106, insofar as they relate to easements or interests in structures, shall apply only to those counties which, by a majority vote of the governing body of the county, choose to come under those provisions. Any incorporated municipality which desires to come under §§ 11-15-101 -- 11-15-106, insofar as they relate to easements or interests in structures, may do so separately by a majority vote of its governing body. In that event, however, only the territory within the corporate bounds of the municipality shall be affected by §§ 11-15-101 -- 11-15-106 insofar as they relate to easements or interests in structures.