U.S. Homeland Security Secretary Kristi Noem on Friday terminated the collective bargaining agreement covering 47,000 Transportation Security Administration officers.

The American Federation of Government Employees, which represents the airport screening officers, said it will file suit to challenge the decision.

In June, a U.S. judge issued a preliminary injunction blocking Noem’s March 7 attempt to end the collective bargaining agreement. DHS said it will implement a new labor framework on January 11 and will no longer be collecting union dues from TSA officers’ paychecks.

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(Reporting by David Shepardson in Washington; Editing by Chris Reese)