The Supreme Court has allowed the Trump administration to reinstate a rule requiring U.S. passports to list a traveler’s biological sex, rejecting lower-court rulings that blocked the policy. Supporters argued it merely records factual information, while opponents said it infringes on the rights and safety of transgender and nonbinary Americans.

Justice Ketanji Brown Jackson, joined by the Court’s other liberal justices, dissented, calling the order inequitable and harmful. The ACLU, which brought the challenge, called the decision a setback for personal freedom and warned of risks to those forced to reveal gender identity inconsistencies in official travel documents.

The policy reverses earlier reforms introduced under the Biden administration, including the “X” gender marker. While litigation continues, the stay allows enforcement of the biological-sex requirement—marking a major flashpoint in the national debate over gender identity, privacy, and federal documentation standards.