Delete the subsections (a) and (b) and substitute the following:

Immediately upon its being placed on the assessment roll the assessment shall be deemed to be complete, the several amounts assessed shall be payable, and the assessments shall be liens against the lots or parcels of land assessed, respectively. The lien shall be subordinate to all existing special assessment liens previously imposed and to state, borough and city property taxes upon the same property. The lien shall be paramount to all other liens. The lien shall continue until the assessment and all interest due and payable thereon are paid.