In a significant development, the Bombay High court today set aside the sale of 600 acre of surplus textile mill land by National Textile Corporation (NTC) in prime locations. The city-based Bombay Environmental Group (BEG) had challenged the sale on the ground that development control rules had been violated in the process. The court also held that whenever the mill land is sold, one-third of it should be reserved for open space, one-third for low cost housing by Maharashtra Housing and Area Development Authority (MHADA) and one-third for mill-owner's benefits.