Subject to the curative provisions of section 7-4-17 of this chapter and the rights of the city to reassess as provided in section 7-4-18 of this chapter, proceedings for writs of review and suits in equity may be filed no later than sixty (60) days after the passage by the city council of the ordinance spreading the assessment; provided, that the property owner shall have filed a written objection to the proposed assessment as provided in section 7-4-8 of this chapter. A property owner who has filed a written objection with the city manager, as required by section 12-4-8 of this chapter, may commence a suit for equitable relief based on a total lack of jurisdiction on the part of the city, and if notice of the improvement shall not have been sent to the owner, and if the owner did not have actual knowledge of the proposed improvement prior to the hearing, then the owner may file written objections alleging lack of jurisdiction with the city manager within thirty (30) days after receiving notice or knowledge of the improvement. No provision of this section shall be construed so as to lengthen any period of redemption, or so as to affect the running of any statute of limitation or in equitable defense of laches. Any proceeding on a writ of review or suit in equity shall be abated if proceedings are commenced and diligently pursued by the council to remedy or cure the alleged errors or defects. (1996 Code § 12.08.100)