No suit or action of any kind shall be instituted or maintained for the purpose of contesting or enjoining collection of any special assessment unless within 30 days after confirmation of the special assessment roll written notice is given to the Council of intention to file such suit or action, stating grounds on which it is claimed such assessment is illegal, and unless such suit or action shall be commenced within 60 days of confirmation of the roll.
(Prior Code, § 1.621)