The Supreme Court on Tuesday let President Donald Trump’s administration continue swiftly deporting people to countries other than their own for now, while the justices consider whether the policy is legal.

The apparent 6-3 order temporarily lifts lower court requirements for migrants to get a chance to object before being sent to countries to which they have no ties.

The Supreme Court will hear arguments in December.

The Trump administration said last week the lower court order forced the cancellation of a deportation flight carrying about 70 people bound for three countries.

The conservative majority has sided with the administration before on the core Trump administration policy, allowing deportation flights to temporarily continue last year.

The court said it will consider several questions: whether the policy is lawful, whether lower courts had the authority to consider the case and issue a sweeping block, as well as other questions the government deems appropriate.

Under a series of often-secret agreements, the Trump administration has deported some 25,000 people to more than two dozen countries, including Liberia and Guyana. The vast majority have been sent to Mexico.

Trump’s Republican administration has said that it sends people with final deportation orders to third countries when they can’t be returned to their homelands or their native countries won’t accept them, including those who have criminal convictions. Those governments provide assurances that people won’t be persecuted or tortured, federal attorneys said.

Attorney General Todd Blanche called the policy “an entirely lawful and critical tool for immigration enforcement” in a social media post.