 In 1982 the United States suspended most favored nation trade status until 1987 and vetoed Poland's application for membership in the International Monetary Fund.Pope John Paul II wrote a letter to the Primate of Poland, Stefan Cardinal Wyszynski, in which he called for peace talks between the state and the workers, supporting the Poles' "undeniable right to resolve their problems by themselves".After the fall of Communism in Poland in 1989, members of a parliamentary commission determined that martial law had been imposed in clear violation of the country's constitution which had authorized the executive to declare martial law only between parliamentary sessions (at other times the decision was to be taken by the Sejm).