U.S. President Donald Trump (left) and Polish President Andrzej Duda in July 2017 | Saul Loeb/AFP via Getty Images Poland’s leaders barred from White House meetings over Holocaust law Polish-American military cooperation might also be in danger.

Poland's leaders will not be allowed to meet with U.S. President Donald Trump or Vice President Mike Pence until Warsaw repeals its controversial new Holocaust law.

Polish web portal Onet.pl (owned by Axel Springer, also a co-owner of POLITICO Europe) on Tuesday reported that it had obtained a memo from Washington dated February 20 about the law, which makes it illegal to suggest that the Polish state or the Polish nation were complicit in Nazi crimes. The information has been confirmed by other Warsaw-based media.

U.S. State Department officials also reportedly warned that the U.S. might withhold funding for joint military projects in Poland because of the law, including the stationing of U.S. troops in the country as part of NATO defense efforts.

According to the document seen by Onet, Wess Mitchell, the U.S. assistant secretary of state for European and Eurasian affairs and a close aide of Secretary of State Rex Tillerson, said the new law was unacceptable because it violates freedom of expression.

He reportedly gave Warsaw a three-point ultimatum.

First, there will be "no high-level bilateral contacts between countries until the crisis gets solved" — which suggests no meetings between President Andrzej Duda and Prime Minister Mateusz Morawiecki and Trump or Pence. Second, if the Polish government doesn't make changes to the law, Congress is likely to block the financing of military projects in Poland. Finally, if Polish prosecutors bring charges against any American citizen for breaching the law, the consequences for Poland would be "dramatic."

According to the report, the Polish foreign ministry was warned of the consequences by the U.S. but failed to pass the information on to the justice ministry which drafted the legislation. The U.S. memo was received fours days after the Polish lower house of parliament backed the law.

Poland's Rzeczpospolita newspaper reported that Tillerson called Duda before he signed the bill into law on February 6, but that the Polish leader did not take the call.

A Polish government spokesperson, Joanna Kopcińska, told the Polish Press Agency on Tuesday: "The Polish-American bilateral strategic partnership is unthreatened, our diplomatic contacts will remain at the current level."

Krzysztof Szczerski, Duda's chief of staff, will be in Washington on Thursday, reportedly to meet with Mitchell.

The law went into effect on March 1, although Duda did send the legislation to be examined by the country's constitutional court. It carries a sentence of up to three years in prison for anyone anywhere in the world who makes the assertion of Polish guilt "publicly and against the facts." One Polish organization has already filed a complaint against a newspaper in Argentina for violating the law.

Israel has also reacted to the law with outrage, jeopardizing what had until now been one of Poland's closest foreign relationships.

Asked about Onet's report at a press briefing on Tuesday, U.S. State Department spokeswoman Heather Nauert said: "The reports that allege any kind of a suspension in security cooperation or high-level dialogue — all of that is simple false ... Poland is a close NATO ally. That will remain; that hasn’t changed. That does not mean that we don’t have disagreements about the legislation that has taken effect."

In response to a question regarding the possibility of a meeting between Poland's president and Trump, Nauert said: "I’m not aware of any meetings that are being discussed or scheduled at that time."

This article has been updated with new information.