The Delaware Supreme Court ruled on Friday that a state law enacting universal mail-in voting violated the state’s constitution.

“The Vote-by-Mail Statute impermissibly expands the categories of absentee voters identified in Article V, Section 4A of the Delaware Constitution,” the court wrote. “Therefore, the judgment of the Court of Chancery that the Vote-by-Mail Statute violates the Delaware Constitution should be affirmed.”

The court further rejected a component of the law that would have created same-day registration throughout the state.

“The Same-Day Registration Statute conflicts with the provisions of Article V, Section 4 of the Delaware Constitution,” the judges found. “Consequently, the judgment of the Court of Chancery that the Same-Day Registration Statute does not violate the Delaware Constitution should be reversed.”