Interviewer instructions
    
                                    Survey code  :  Whether the originally  selected sample household has been surveyed or a substituted household has been  surveyed will be indicated against this item  by  recording '1' if it is the originally selected sample household, and '2' if it  is the  substituted one.  If neither the originally  selected household  nor the substituted household could be surveyed  i.e., if  the  sample  household  was a casualty,  code  '3'  would  be recorded.   In such cases only blocks 0,1, 2, 13 and 14  will  be filled  up and on the top of the front page of the  schedule  the word 'CASUALTY' will be written and underlined.