UNITED NATIONS (AP) — The United States has called for a vote Monday on new U.N. sanctions against North Korea, though exactly what measures will be in the resolution remain a mystery.

Security Council diplomats, who weren’t authorized to speak publicly because talks have been private, said the U.S. and China were still negotiating the text late Sunday.

Last Tuesday, the U.S. circulated a draft resolution proposing the toughest-ever U.N. sanctions on North Korea, including a ban on all oil and natural gas exports to the country and a freeze on all foreign financial assets of the government and its leader, Kim Jong Un.

Previous U.N. sanctions resolutions have been negotiated between the United States and China, and have taken weeks or months. But the Trump administration is demanding a vote in six days.