(a) In order to fund the annual and long-term costs for each stormwater maintenance district, the county government shall establish a fee structure for each district and divide the annual cost, plus a pro rata administrative cost as determined by the county government, by the total number of applicable units within the stormwater maintenance district to arrive at the annual unit cost. The annual unit cost shall be assessed against each unit located within the boundaries of the stormwater maintenance district. No parcel of real estate may be exempt from paying its annual unit cost. The established fee structure does not need to be uniform among districts.
(b) County government shall levy and collect the annual unit cost assessed against each unit in a stormwater maintenance district at the same time and in the same manner as other New Castle County taxes and the annual unit cost is a lien on real property the same as other New Castle County taxes. The county government shall include this fee on tax bills under the heading “stormwater maintenance fee.”