From Assam Accord to NRC: A timeline

1951: First Census of Independent India conducted. First NRC compiled based on Census

Dec 30, 1955: Citizenship Act comes into force – set rules for Indian citizenship by birth, descent, registration

1971: Bangladesh war leads to influx of refugees in India

1978: Voters' list in 1978 bypoll to Mangaldoi Lok Sabha seat sees surge. All Assam Students Unions (Aasu) wants elections called off till names of 'foreigners' struck off electoral rolls

1979-1985: Six-year Assam Agitation led by Aasu and All Asom Gana Sangram Parishad (AAGSP) calls attention to problem of 'illegal immigration

Feb 18, 1983: 2,191 people, mainly Muslims, in central Assam killed, allegedly by Assamese tribals. Nellie Massacre takes place amid protests by indigenous Assamese against decision to grant millions of immigrants the right to vote in state elections.

Dec 12, 1983: Parliament passes Illegal Migrants (Determination by Tribunals) Act 1983 to stem inflow of immigrants. Act struck down by SC in 2005.

Aug 15, 1985: Assam Accord signed by Centre, Assam govt, Aasu and AAGSP to end agitation and provide for 'detection, deletion and deportation' of foreigners as defined by 1983 Act.

2003: Citizenship (Amendment) Act introduced.

July 2005: Indian SC strikes down Illegal Migrants (Determination by Tribunals) Act, 1983, calling it unconstitutional.

2013: Indian SC calls for update of NRC; process begins in 2015.

Dec 31, 2017: First draft of new NRC published. Only 1.9 crore names out of 3.29 crore applications included

July 30, 2018: Final draft of NRC with 2.89 crore names published. 40 lakh names omitted. Exclusions increased to over 41 lakh in June 2019.

August 31, 2019: Final NRC list published. 19,06, 657 people excluded from the list.