New Delhi, June 28 -- The Registrar General of India (RGI) has started securing and preserving physical and digital records collected by millions of enumerators over the past two months, during the first phase of the Census 2027 exercise - the house-listing operations (HLO) - in 19 states and five Union territories, people familiar with the development said on Saturday. Officials said detailed instructions were recently issued to Census officials, with information on the safe custody and preservation of working schedules, block maps, layout sketches, partially and fully filled forms, and other related documents. The Directorate of Census Officers (DCOs) across the country also conveyed to all officials that the collected data is "confidenti...