Arshad al-Umari 1945. On April 26 the San Francisco Conference consisting of 50 nations met to discuss the draft of the United Nations Organization. al-Umari, the head of the Iraqi delegation, in protest against the apparent intention of the great powers to partition the British Mandate of Palestine into a Jewish State and an Arab State, refused to sign the charter and left the conference returning to Iraq on June 13, 1945. On June 26 the Charter was signed. Dr. Fadhil Al-Jamali signed on behalf of Iraq. After his return to Iraq, al-Umari resigned from the cabinet as Minister of Foreign Affairs
International Civil Aviation Organization convention, held in London in 1912 allocated the first radio callsigns for use by aircraft. ICAN continued to operate until 1945. Fifty-two countries signed the Chicago Convention on International Civil Aviation, also known as the Chicago Convention, in Chicago, Illinois, on 7 December 1944. Under its terms, a Provisional International Civil Aviation Organization (PICAO) was to be established, to be replaced in turn by a permanent organization when 26 countries ratified the convention. Accordingly, PICAO began operating on 6 June 1945, replacing ICAN. The 26th country ratified the Convention on 5 March 1947 and, consequently PICAO was disestablished on 4