Backed by a federal judge, Judicial Watch sent 25 questions to Hillary Clinton on Tuesday about her use of a private email server for official State Department business.

Clinton must provide sworn answers by Sept. 29—on penalty of perjury—in the middle of the televised debates in the last leg of the presidential campaign.

Pursuant to Rule 33 of the Federal Rules of Civil Procedure, the conservative watchdog group is allowed to pose up to 25 written questions to Clinton, which the former secretary of state must answer within 30 days.

Providing false answers would subject Clinton to prosecution for perjury, which a Trump Justice Department would be able to initiate at any time well into the next presidential term.

Failing to fully answer all of the questions by Sept. 29 would subject Clinton to being held in criminal contempt of court by Judge Emmett Sullivan of the U.S. District Court for the District of Columbia. He’s the federal judge residing over Judicial Watch v. U.S. Department of State, who ordered that Clinton answer the interrogatories. Such contempt citations can range all the way from financial penalties to immediate arrest and incarceration.

In the opinion accompanying his order, Sullivan wrote, “The Court is persuaded that Secretary Clinton’s testimony is necessary to enable her to explain on the record the purpose for the creation and operation of the clintonemail.com system for State Department business.”

The 25 questions transmitted by Judicial Watch to Clinton are:

Judicial Watch President Tom Fitton said in a statement Tuesday, “These are simple questions about her email system that we hope will finally result in straight-forward answers, under oath, from Hillary Clinton.”

Ken Klukowski is senior legal editor for Breitbart News. Follow him on Twitter @kenklukowski.