Delaware Code
Subchapter I. General Provisions
§ 303. Vacancies in county government.

(a) In case of a vacancy in the county government, for any cause, the members of that county government may, by a majority vote of the remaining members, fill that vacancy temporarily pending a special election to fill the vacancy.
(b) The special election shall be held within 6 months of the occurring of the vacancy and shall be held in the same manner as a regular election for a full term would be.
(c) The person so elected shall hold office for the duration of the unexpired term.