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Item 18: dwelling unit (code): This item refers only to the dwelling unit or the actual residence of the sample household. The dwelling unit may be an entire structure or may be only a part of a structure. Accordingly, the investigator will ask the informant if it is owned, hired or otherwise occupied. If the occupant owns the dwelling unit, code 1 will be recorded against item 18. If it is taken on rent, code 2 will be entered and if it is occupied otherwise, code 9 will apply. However, if any household is found living under trees, bridges, in pipes, etc. it will not be treated as living in dwelling unit. For such households code 3 will be recorded. It may be noted that a dwelling unit constructed on a plot of land which is taken under long-term lease, usually 30 years or more, will be considered as being held in owner-like possession. Similarly, a dwelling unit itself possessed by a household under a long-term lease may be treated as in owner-like possession and code 1 will be applicable in such cases also.