No suit shall be sustained to set aside any assessment, or to contest the area of assessment, or to enjoin the board of county commissioners from levying or collecting any such assessment, or installment thereof, or interest or penalty thereon, or issuing the bonds, or providing for their payment or contesting the validity thereof on any ground, or for any reason, other than for the failure of the board to adopt and publish the resolution declaring the necessity for such improvements and the publication thereof as provided in Section 6 of this act,¹ and to give notice of the hearing on the return of the appraisers unless such suit shall be commenced not more than fifteen (15) days after the publication of the resolution levying assessments and no suit shall be sustained after the work has been completed and accepted by such county, except for failure to give such notice of the preliminary resolution of necessity or the failure to give the notice of the hearing on such return of the appraisers; and provided, further, that in the event any special assessment shall be found to be invalid or insufficient, in whole or in part, for any reason whatever the board may, at any time in such manner provided for levying an original assessment, proceed to cause a new assessment to be made and levied which shall have like force and effect as an original assessment.