Del. Code Ann. tit. 9, § 5513
(a) As an alternative to levying ad valorem taxes under this chapter, the Levy Court may levy special taxes on real property in a special development district to cover the cost of improvements, including infrastructure improvements, including but not limited to “costs” defined in § 5501 of this title. In determining the basis for and amount of the tax, the cost of an improvement may be calculated and levied:
(b) The Levy Court may provide by ordinance or resolution for: