Key amendments
1st | June 18, 1951 Secured constitutional validity of zamindari abolition laws, placed reasonable restrictions
on freedom of speech, and introduced Schedule 9
7th | November 1, 1956: Reorganisation of states on linguistic lines
26th | December 28, 1971: Abolition of privy purses paid to former rulers
36th | April 26, 1975: Formation of Sikkim as a state within the Indian Union
42nd | January-February 1977: Passed during the Emergency, included ‘Socialist’ and ‘Secular’ in the Preamble
52nd | March 1, 1985: Introduced Anti-defection law
61st | March 28, 1989: Reduced voting age to 18 from 21
73rd, 74th | April-June,1992: Introduced Panchayati Raj and statutory status to urban local bodies
91st | January 1, 2004: Restricted the size of council of ministers to 15% of legislative members
93rd | January 20, 2006: Provided for 27% reservation to OBCs in government and private educational institutions
100th | July 31, 2015: Exchange of enclaves between India and Bangladesh
101st | July 1, 2017: Introduced Goods and Services Tax
103rd | January 12, 2019: 10% reservation for Economically Weaker Sections
106th | September 28, 2023: Reserved one-third of seats in Lok Sabha and state assemblies for women