The U.S. Department of Education on Monday said an Illinois school district violated anti-discrimination laws by denying a transgender student, who identifies as a girl, access to a locker room. In a letter to the Palatine, Illinois, school district, the Education Department’s Office of Civil Rights said requiring a transgender student to use private changing and showering facilities was a violation of the student’s rights under Title IX, which bans sex discrimination. The Education Department gave school officials 30 days to reach an agreement or face sanctions, which could result in administrative law proceedings or a Justice Department court action. The district could also lose some or all of its Title IX funding. The student, who was not identified, should be given access to all girls’ facilities, the letter said.