The current Political Constitution of the Republic of Chile, approved by Chilean voters in a controversial plebiscite on September 11, 1980, under the military dictatorship of Augusto Pinochet, partially effective March 11, 1981, fully effective 11 March 1990 and amended considerably on August 17, 1989 (via referendum) and on September 22, 2005 (legislatively), and also in 1991, 1994, 1997, 1999, 2000, 2001, 2003, 2007, 2008, 2009 and 2010, replaced the earlier constitution of 1925. It is Chile's eighth constitution. In its original permanent dispositions, it gave the President of the Republic a large amount of power; however, some of these dispositions, such as the power of dissolving the Lower Chamber of Congress and serving eight-year terms with possibility of reelection, were modified or eliminated after 1990, when the country regained its democracy and the Congress was reestablished. It created some new institutions, such as the Constitutional Tribunal and the controversial National Security Council (COSENA).