Justice Ketanji Brown Jackson issued her first majority opinion Tuesday since joining the U.S. Supreme Court.

Jackson wrote the opinion in the case of Delaware vs. Pennsylvania Et. Al — a case concerning a dispute between multiple states on escheatment of unclaimed money. The court overruled objections from Delaware and greenlighted the continued authority of a special master in the proceedings consistent with the court opinion.

The eight other justices unanimously supported Parts I, II, III, and IV-A of the opinion. She was joined by Chief Justice John Roberts and Justices Sonia Sotomayor, Elena Kagan and Brett Kavanaugh in her opinion regarding Part IV-B. Justices Neil Gorsuch, Samuel Alito, Clarence Thomas and Amy Coney Barrett did not concur with Part IV-B.