Assam, being a border state with unique problems of illegal immigration, had a register of citizens created for it in 1951 based on the
1951 census data. However, it was not maintained afterwards. The
Illegal Migrants (Determination by Tribunal) Act, 1983 was then passed by the Parliament, creating a separate tribunal process for identifying illegal migrants in Assam. The
Supreme Court of India struck it down as unconstitutional in 2005, after which the Government of India agreed to update the Assam NRC. Following unsatisfactory progress on the process of updating the Assam NRC for over a decade, the Supreme Court started directing and monitoring the process in 2013. The final updated NRC for Assam, published on 31 August 2019, contained 31 million (3.1 crore) names out of its population of 33 million (3.3 crore), leaving out 1.9 million (19 lakh) applicants, rendering them potentially
stateless. The ruling
Bharatiya Janata Party (BJP), which has championed the NRC exercise, did not find the results meeting its expectations. It believes that several legitimate citizens were excluded while many illegal migrants were included. The BJP has promised to implement the NRC for all of India in its election manifesto for the
2019 Indian general election. According to the Citizenship Rules, 2003, the central government can issue an order to prepare the National Population Register (NPR) and create the NRC based on the data gathered in it. The 2003 amendment further states that the local officials would then decide if the person's name will be added to the NRC or not, thereby deciding their citizenship status. No new rules or laws are needed to conduct this exercise in the whole of India. ==Legal and regulatory provisions==