The Indian Constitution, implemented in 1950, was a secular constitution that guaranteed citizenship to all the country's residents.[26] The Indian government passed the Citizenship Act in 1955, seven years after India became an independent country. This act, and its subsequent amendments, prohibited illegal migrants from obtaining Indian citizenship.[27] The act defined illegal migrants as citizens of other countries who entered India without valid travel documents, or who remained in the country beyond the period permitted by their travel documents. It also allowed for these individuals to be deported or jailed.[27] According to UNHCR, there are more than 200,000 refugees residing in India.[28][29][lower-alpha 2] India is not a signatory to the 1951 UN Refugee Convention and does not have a national policy on refugees.