The letter obtained by The Associated Press says that lawmakers will be able to review unredacted versions of the more than 3 million files that the Justice Department has released to comply with a law passed by Congress last year.

To access the files, lawmakers will need to give the Justice Department 24 hours’ notice. They will be able to review the files on computers at the Department of Justice. Only lawmakers, not their staff, will have access to the files, and they will be permitted to take notes, but not make electronic copies.