On 29 June 1990, the parliament started work on amendments to the Constitution of Croatia designed to remove all references to communism and socialism. The amendments were prepared and adopted on 25 July. The official name of the republic was changed to the Republic of Croatia, the President of the Presidency became the President of Croatia, and a new coat of arms was adopted as a chequy of 25 red and white fields, which replaced the red star on the flag of Croatia. Serbs interpreted the chequy used in the new arms and flag as provocative and reminiscent of NDH and Ustaše. While the chequy was used by the Nazi-puppet regime during the World War II, the symbol was also used in the arms of Croatia as a constituent part of Yugoslavia. Nonetheless, Serbs perceived the symbol as threatening.