Census Act, 1948

9.Occupier to permit access and affixing of numbers:-

Every person occupying any house, enclosure, vessel or other place shall allow census-officers such access thereto as they may require for the purposes of the census and as, having regard to the of customs of the country, may be reasonable, and shall allow them to paint on, or affix to, the place such letters, marks or numbers as may be necessary for the purposes of the census.