§ 11.6. — Review of Improvement District Proceedings:

No action or proceeding, at law or in equity, to review any acts of [or] proceedings or to question the validity of, or enjoin the performance of the issue or collection of any securities, or the levy or collection of any assessments authorized by this Article; or for any other relief against any acts or proceedings of the City done or under this Article, shall be maintained against the City, unless commenced within thirty (30) days after the performance of the act or the effective date of the resolution or ordinance complained of, or else be thereafter perpetually barred.