Tenn. Code § 20-13-103
The attorney general and reporter may compromise and settle, insofar as the state is concerned, any civil litigation to which the state may be a party, upon such terms as in the attorney general and reporter's opinion may seem to be in the best interest of the state, and may enter into such agreements in connection with the compromise and settlement as may be necessary to effectuate the purposes of this section. Written approval of the comptroller of the treasury and governor shall be required for any compromise and settlement greater than twenty-five thousand dollars ($25,000). The attorney general and reporter shall submit a report quarterly to the comptroller of the treasury and governor of all compromises and settlements made without the written approval of the comptroller of the treasury and governor. The written approval of the speaker of the senate and the speaker of the house of representatives, the comptroller of the treasury and governor, shall be also required for the compromise and settlement of such civil litigation to which the state may be a party if the compromise and settlement will result in a significant increase in state expenditures, affect the bond rating of the state or result in a decision on a policy issue that may result in a significant increase in state expenditures.
T.C.A. § 20-13-103