Tennessee Code Title 9. Public Finances § 9-11-106

Any action or proceedings in any court to set aside a bond order, or to obtain any other relief upon the ground that the order is invalid, or that the indebtedness to be funded or refunded is invalid, or that there is no authority for the levy of a tax to pay the principal of and interest on the bonds, must be commenced within thirty (30) days after the first publication of the notice aforementioned and the bond order referred to in the notice. After the expiration of such period of limitation, no right of action or defense founded upon the invalidity of the bond order or the indebtedness to be funded or refunded or the tax to be levied shall be asserted, nor shall the validity of the bond order or of the funding or refunding bonds to be issued or the tax to be levied for the payment of the principal of and interest thereon, be open to question in any court upon any ground whatever, except in an action or proceedings commenced within such period.