On May 3, the U.S. Copyright Office issued a notice of proposed rulemaking (NPRM) regarding an amendment to the regulations to address the filing of agreement-based counterclaims and related discovery requirements in cases before the Copyright Claims Board (CCB). The NPRM proposes amendments related to asserting and responding to agreement-based counterclaims as well as standard interrogatories and standard requests for the production of documents for such counterclaims. Written comments are due by June 20.