Section 78(1) in Assam Notified Urban Areas (Other than Guwahati) Building Rules, 2014
(1)Every room in such building shall be lighted and ventilated by sufficient number of windows, ventilators and skylight exclusive of doors having clear opening not less 1/15 of the floor area abutting such open space: provided that this requirement may be relaxed if artificial lighting and ventilation are installed to the satisfaction of the Authority.
