Tenn. Code Ann. § 48-53-203

For the purpose of this part, “good cause” means to exclude any refusal or failure by the Tennessee nonprofit corporation to make purchases of or to contract to make purchases of goods or services where the board of directors of the Tennessee nonprofit corporation determines, according to the standards set forth in § 48-58-301, that making a purchase or contracting to make a purchase is not in the best interest of the Tennessee nonprofit corporation or is commercially unreasonable.