US Supreme Court Chief Justice John Roberts on Sunday issued a stay of the contempt order and accrual of fines for a foreign company speculated to be a part of Special Counsel Robert Mueller’s investigation.

The stay sets a deadline of December 31 at noon for the Court to further respond and decide if they want to take the case.

The decision is in response to a previous ruling by the DC Circuit Court denying the company’s appeal of a grand jury subpoena. The unnamed company appealed on the grounds of the Foreign Sovereign Immunities Act and asserted that the subpoena would require the corporation to violate its country’s laws.

In the decision, the circuit court stated there was a reasonable probability that the company had taken actions outside of the US that directly had an effect in the US, exempting them from the Foreign Sovereign Immunities Act. Additionally, the company fell short of carrying the burden of proving that cooperation would violate foreign law.

The secrecy of the entities involved in this case is shown by the DC federal courthouse’s lockdown of an entire floor during an appeal argument to hide the identities of the lawyers.

The link between this case and the Mueller investigation was proposed earlier this year based on a reporter being in the clerk’s office when an aloof man requested a copy of the sealed filing. This was strengthened by the only Trump-appointed judge on the DC circuit court recusing himself from this sealed trial.

It has been speculated that this would be the first time the Supreme Court takes on a completely sealed case. There is no procedure in the Court’s rules for having the brief, argument, and decision sealed.