Del. Code tit. 15 § 7541
The special election shall be held on the date fixed by County Council pursuant to § 7540 of this title and shall be previously advertised by publishing a notice in a newspaper published within the County and having a general circulation therein, once in each of 2 weeks preceding the week in which the special election is held, and by posting a notice in a prominent place in the building at which County Council meets for the conduct of legislative business. The notices shall state the time and place of the special election and further state that the purpose of the special election is to determine whether a majority of the qualified voters in each parcel of the territory are in favor of the annexation by the City of Wilmington. The posted notice shall also provide a detailed description of the territory, including, but not limited to, a map showing the territory in relation to the City of Wilmington and the area surrounding the territory.
15 Del. C. § 7541