Del. Code tit. 9, § 2206

The faith and credit of the County are pledged to the payment of any bonds issued by the County under this chapter. The County Council shall annually appropriate to the payment of such bonds and the interest thereon the amounts required to pay such bonds and interest as the same become due and payable. Notwithstanding the provisions of any other law the County Council may levy an ad valorem tax, without limitation as to rate or amount, upon all property taxable by the County to raise the moneys necessary to meet any such appropriation.