Section 9(4) in West Bengal Municipal (Building) Rules, 2007
(4)For "mother plot" measuring more than 5,000.00 sq. metres in area, sub-division may be allowed, provided eight per cent of the total area of the "mother plot" is developed as public open space. The width of each such open space shall not be less than 10.00 metres and each such open space shall abut a street having a width of not less than 7.00 metres. The minimum area of each such open space in one parcel shall be 400 square metres. This open space shall be in addition to the land required for providing the means of access to the individual plots obtained by sub-division of "mother plot".
