Any informality or irregularity in the proceedings in connection with the levy of
any fire rescue assessment under the provisions of this ordinance shall not affect
the validity of the same after the approval thereof, and any fire rescue assessment
as finally approved shall be competent and sufficient evidence that such fire rescue
assessment was duly levied, that the fire rescue assessment was duly made and adopted,
and that all other proceedings adequate to such fire rescue assessment were duly had,
taken, and performed as required by this ordinance; and no variance from the directions
hereunder shall be held material unless it be clearly shown that the party objecting
was materially injured thereby.