If the Township Council determines that the improvement or improvements shall be constructed or installed under Subsection b2(a)(2) above, the Planning Board shall, as provided in Subsection d of this subsection, estimate the difference between the total costs to be incurred and the total amount by which all properties to be benefited thereby, including the subdivision property or tract, will be especially benefited by the improvement, and the subdivider or developer shall be liable to the Township therefor, as well as for the amount of any special assessments against the subdivision property or tract for benefits conferred by the improvement or improvements. Further, the Township Council shall adopt an ordinance authorizing and providing for the financing of the improvement or improvements and the assessment of benefits arising therefor in a manner consistent with the obligation of the subdivider or developer with respect thereto, and proceedings under such ordinance shall be in accordance with N.J.S.A. 40:56-1 et seq., except to the extent modified by the obligation of the subdivider or developer for any excess of total costs over total benefits conferred, as set forth above.