prompted by complaint by haryana state pollution control, the gurgaon district authorities demolished some dwelling units in aravali retreat. the contention of the state and district authorities is that aravali retreat is aravali "gairmumkin pahad", (mountain) and that its change to "gairmumkin" farm houses by the district authorities in 1990 is void. the aravali retreat plot owner's association denies that the residents violated any environmental laws including notification dated 7 may 1992. they claim that the notification was not applicable to the plot owners because the land had been categorized as farmhouse in the revenue records of the state in 1990, i.e., prior to the 1992 notification.