(a) The value of all of the taxable property of the district shall be taken at the assessed value as determined in the manner provided by the Property Tax Code, and an amount equal to the total of the principal and all interest to maturity on the bonds voted plus the estimated cost of collection of taxes shall be assessed against the taxable property of the district on the ad valorem basis.
(b) The tax against the taxable property of each owner shall be that portion of the total principal and interest of the dissolution bonds and costs of collection which the assessed value of the taxable property of the owner bears to the total assessed values in the district.