Sec. 20. A resolution authorizing bonds, notes, or other evidences of indebtedness payable from revenues must provide that a bond, note, or other evidence of indebtedness payable from revenues contain a recital that the bond, note, or other evidence of indebtedness is issued under this article or under IC 13-3-3 (before its repeal). A bond, note, or other evidence of indebtedness containing the recital under authority of such a resolution is conclusively considered:
(1) to be valid; and
(2) to have been issued in conformity with this article or IC 13-3 (before its repeal).