Del. Code tit. 15, § 4101

The residency requirements for candidates for elective office shall be as set forth in the municipal charter, state statute or state Constitution governing the qualifications of candidates for elective office in the city, county, area or district in which the candidate proposes to seek elective office. In instances where a court has declared a residency requirement to be unconstitutional and until such time as a new residency requirement becomes effective, no person may be a candidate for elective office unless such person has been a resident of the city, county, area or district for a period of at least 1 year prior to seeking elective office.