Tenn. Code Ann. § 7-51-1004: Action on behalf of state - Immunity

(a) Any municipality or other governmental entity is authorized to carry out this part as acts of government on behalf of the state as sovereign, to the extent the governmental entity deems necessary or appropriate, even if it is anticompetitive in effect.

(b) All immunity of the state of Tennessee from liability under state and federal antitrust law is hereby extended to any municipality or other governmental entity within the scope of authority contained in this part, and, when so doing, a municipality or other governmental entity shall be presumed to be acting in furtherance of state policy.