In any civil action where a timely notice of appeal to the Supreme Court is filed by a party, any other party may file a notice of appeal within 15 days of the date on which the first notice of appeal was filed or within the time otherwise prescribed by this title, whichever expires last.
Del. Code tit. 10, § 149
Time for cross-appeal in civil actions
10 Del
Official source: Delaware Code Online. Reproduced from public-domain Delaware statutes; confirm against the official source for the current text. Not legal advice.