Section 43(2) in The Haryana New Mandi Townships Building Rules, 1967
(2)Where the building is intended to be used as a residential building and the external wall which is deemed to be divided into distinct lengths by the cross-wall does not exceed 6 metres (19.685 feet) in height and 16.50 metres (34.4484 feet) in length, the cross-walls may be not less than 11.436 centimetres (four and a half inches) thick.
