20 August 1991. The new Constitution was introduced on 29 July 1992. It was partly linked to the Constitution of 1938, serving further the claims to constitutional continuity. Estonia's official position since 1990 has been that the election for the "People's Riigikogu" was illegal and unconstitutional, since it was held under an amended electoral law that was passed only by the lower house, the Chamber of Deputies. The upper house, the National Council, had been dissolved shortly after the occupation; the Estonian Constitution explicitly required bills to be passed by both chambers to become law. The National Council was never reconvened, and the 1940 election was only for the Chamber of Deputies. According to August Rei, one of independent Estonia's last envoys to Moscow, under the Estonian constitution, the Chamber of Deputies had "no legislative power" apart from the National Council. On these bases, Estonia maintains that all acts of the "People's Riigikogu" were void. Latvia Following the Soviet period, On the Restoration of Independence of the Republic of Latvia was adopted on 4 May 1990. It was to restore the authority of the Constitution of 1922, except for a few provisions, and provided for the restoration of independence through negotiations with the Soviet Union. It also outlined several reasons why the 1940 annexation was invalid. According to the declaration, the election was conducted under an illegal and unconstitutional election law adopted under conditions of terror, and the results were blatantly rigged. It also contended that under the 1922 Constitution, the legislature did not have the right to change the form of the state, but was required to submit such proposed changes to the people in a referendum. Constitutional law On statehood of the Republic of Latvia declaring immediate restoration of full independence was adopted on 21 August 1991. The fifth parliament was elected in 1993, which restored the Constitution of 1922, and upheld the legal continuity of the Republic of Latvia. Lithuania Unlike Estonia and Latvia, Lithuania proclaimed the Re-Establishment of the State of Lithuania on 11 March 1990 without a period of transition. The act emphasised the 1918 act and the 1920 resolution for the purposes of constitutional continuity. The Congress of Soviets adopted a resolution on 15 March 1990 in which Lithuania's decision violated the Constitution of the Soviet Union. Lithuania adopted a Resolution on the Liquidation of the 1939 Germany–USSR Agreements and their Consequences on 7