List of Abbreviations Abbreviation Definition BJP Bharatiya Janta Party BLO Block-level Officer CAA Citizenship Amendment Act, 2019 COVID19 Coronavirus Disease 2019 D-voters Doubtful or Disputed Voters EC Election Commission of India ERO Election Registration Officer FTs Foreigners Tribunals GHC Gauhati High Court HC IMDT Act Legacy Documents High Court Illegal Migrants (Determination by Tribunals), Act Inclusion of parent’s or grand-parents’ name/s in specific pre1971 documents considered legacy documents for Assam - like pre-1971 voters’ list, 1951 NRC, land records, etc. Linkage Document Document establishing direct descent of person who’s legacy is used for making the NRC application.