The Trump administration may not carry out mass firings at the Education Department”s Office of Civil Rights, a federal judge ruled on Wednesday, finding such an action unconstitutional.

U.S. District Judge Myong Joun of Massachusetts granted a preliminary injunction to enjoin the large-scale reduction in force (RIF) announced on March 11. In his ruling, he found that there was a “likelihood of success” in the plaintiffs’ argument that the RIF was “arbitrary and capricious” and that they will suffer “irreparable harm” from the order.

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The case was brought by two students “who have experienced severe race-based and disability-based harassment in school” and their parents, as well as the Victim Rights Law Center (VRLC), a nonprofit organization that represents victims of sex-based harassment.

The plaintiffs argued the RIF would restrict the Office of Civil Rights (OCR), whose mission is to “ensure equal access to education and to promote educational excellence through vigorous enforcement of civil rights in our nation’s schools,” from being able to carry out its designed functions.

Joun, a Joe Biden appointee, found that there was merit to this claim.

“[T]he RIF leaves OCR with the capacity to address only a small fraction of the complaints that it receives, making it impossible for OCR to comply with its statutory and regulatory obligations,” he wrote, pointing to “shuttered offices” and the loss of “regional expertise and community relationships.”

“The closings have made it costly and often infeasible for investigators to visit schools in-person to gather critical facts, making it impossible for OCR to complete investigations and cases promptly and fairly,” Joun added.

He found that, when schools are either participating in discrimination or allowing it to continue, the only place students can turn is OCR. And because the student plaintiffs are unable to return to school while their cases continue, and the investigations in these cases have stalled due to the RIF, “they face irreparable harm.”

As it concerns VRLC, Joun wrote that because the organization has had to deviate from its “core mission” of “providing legal recourse to victims of sexual and gender-based violence” because it no longer has OCR as a resource, it, too, faces “irreparable harm.”

“Taken together, the detriment Plaintiffs face cannot be remedied through retroactive relief or money damages. Thus, I am convinced that, absent an injunction, the risk of harm to Plaintiffs is immediate and irreparable,” the judge wrote.

As part of the order, the Trump administration is not just prohibited from carrying out its March 11 RIF as to the OCR, but it must “take all steps necessary to facilitate the return” of employees fired or set to be fired. The federal government was also given 72 hours to file a status report of its actions to comply.