The Delhi Land Revenue Act, 1954
16. Maintenance of map and field book-
The Deputy Commissioner, shall, in accordance with rules made under Section 84, maintain a map and field-book of each village, and shall cause annually, or at such longer intervals as the Chief Commissioner may prescribe, to be recorded therein all changes in the boundaries of each village or field and shall correct any errors which are shown to have been made in such map or field-book.
The Delhi Land Revenue Act, 1954