Tenn. Code Ann. § 7-64-101: [For contingent amendment, see the Compiler's Notes.] Eligibility for deferral

(a) The legislative body of any county or municipality may provide by resolution that any single person age sixty-five (65) years of age or older, or any married couple of which both are sixty-five (65) years of age or older, or any person who is totally and permanently disabled, who owns real property, and who uses and occupies such property as a place of residence, may apply to the county trustee of the county where such residence is located for a deferral of payment of all real property taxes on such residence.

(b) [For contingent amendment, see the Compiler's Notes.] This part shall not apply to any single person age sixty-five (65) years of age or older, or to any married couple of which both are sixty-five (65) years of age or older or to any family group that has more than one (1) person residing permanently in the principal residence, whose combined gross income, as defined by the Internal Revenue Code (26 U.S.C.) is greater than twelve thousand dollars ($12,000) a year.