Tennessee Code Title 10. Public Libraries, Archives and Records § 10-7-202

(a)(1) Notwithstanding any other law to the contrary, each register not maintaining all indices required by law on a medium to be read and used by means of a computer or a word processor shall procure as provided by § 10-7-102 or other general law, two (2) or more well-bound books of suitable size, volume and grade of paper, in which the register shall make, enter, and keep a general direct and general reverse index of each and every instrument filed for record or recorded in the office of register, except that notices of completion of improvements to real estate and such other instruments that are not susceptible to direct and reverse indexation may be indexed separately using only a direct index and not entered in a reverse index.

(2) Notwithstanding any other law to the contrary, each register shall have discretion regarding whether to maintain separate indices for distinct books, files, or groups or combinations of records, or whether to combine all indices in a master direct and reverse index for all records maintained in the office of the county register.