Bills in chancery shall be filed in the name of the county in which the lands are situated for the use of the improvement district for the benefit of which the assessments were made, and against the owners, if known, and, if unknown, against them as such; and the owners of all lands upon which such assessments are delinquent may be made defendants to the same bill as parties to the bill.
T.C.A. § 69-5-821