Documents that Google subpoenaed to help defend itself against South Carolina’s federal antitrust suit are not subject to 11th Amendment immunity, the U.S. Court of Appeals for the Fourth Circuit has ruled in a decision compelling the South Carolina Department of Parks, Recreation and Tourism (SCPRT) to produce the information.

“When South Carolina, through its attorney general, joined the action against Google, it voluntarily invoked federal jurisdiction,” Judge G. Steven Agee wrote for the appeals court this past Wednesday. “That invocation, Supreme Court precedent plainly instructs, resulted in a complete and irrevocable waiver of the State’s Eleventh Amendment immunity as to all matters arising in that lawsuit, including the State-endorsed Rule 45 subpoena issued to SCPRT.”