Treaty on the Creation of the USSR on 30 December 1922 by a conference of delegations from the Russian SFSR, the Transcaucasian SFSR, the Ukrainian SSR and the Byelorussian SSR. The Treaty and the Declaration were confirmed by the 1st Congress of Soviets of the USSR and signed by heads of delegations Mikhail Kalinin, Mikhail Tskhakaya, Mikhail Frunze and Grigory Petrovsky, Aleksandr Chervyakov respectively on December 30, 1922. The treaty provided flexibility to admit new members. Therefore, by 1940 the Soviet Union grew from the founding four republics to 15 republics. On 8 December 1991, Russian, Ukrainian and Belarusian Presidents signed the Belavezha Accords. The agreement declared
Madrid Conference of 1991 an opening forum for the participants and had no power to impose solutions or veto agreements. It inaugurated negotiations on both bilateral and multilateral tracks that also involved the international community. The Syrian and Lebanese negotiators agreed on a common strategy. It was the last conference held with both the USSR and US present; the USSR collapsed later that year in December 1991. The Madrid Conference was followed by two parallel tracks of negotiations. The bilateral track was aimed at achieving peace treaties between Israel and its three neighbor states Jordan, Lebanon and Syria as well as with the Palestinians.