A federal judge on Tuesday issued a broad injunction against President Donald Trump’s order aimed at halting taxpayer-funded transgender procedures for federal inmates.

U.S. District Judge Royce Lamberth of Washington, D.C., granted class-action status to a lawsuit filed by the American Civil Liberties Union (ACLU). The suit represents more than 1,000 federal prisoners who are utilizing government-funded prison resources to access clothing, hormone treatments, and related services.

“In light of the plaintiffs’ largely personal motives for undergoing gender-affirming care, neither the BOP nor the Executive Order provides any serious explanation as to why the treatment modalities covered by the Executive Order or implementing memoranda should be handled differently than any other mental health intervention,” Lamberth wrote in a 36-page ruling.

“[N]othing in the thin record before the Court suggests that either the BOP or the President consciously took stock of — much less studied — the potentially debilitating effects that the new policies could have on transgender inmates before the implementing memoranda came into force,” Lamberth added.

The ruling marks another instance of a federal judge issuing a decision with implications far beyond the original scope of the case. The ACLU initially filed the lawsuit on behalf of just three transgender-identifying inmates, but the court later expanded it to class-action status.

The White House said the “decision allowing transgender women, aka MEN, in women’s prisons fundamentally makes women less safe and ignores the biological truth that there are only two genders. The Trump administration looks forward to ultimate victory on this issue in court.”

Trump issued an executive order on January 20 setting the administration’s official stance of recognizing only two genders, male and female, and rejecting “ideologues who deny the biological reality of sex.”

“The Attorney General shall ensure that the Bureau of Prisons revises its policies concerning medical care to be consistent with this order, and shall ensure that no Federal funds are expended for any medical procedure, treatment, or drug for the purpose of conforming an inmate’s appearance to that of the opposite sex,” the order says in part.