Section 25 in The Chennai City Corporation Building Rules, 1972
25. Courtyard.
(1)Every interior courtyard shall be raised at least thirty centimetres above the level of the centre of the nearest street to admit to easy drainage into the street.(2)Notwithstanding anything contained in the rules, these Commissioner may permit for periods not exceeding three months at a time, the construction of temporary marriage or summer pandals over such interior courtyards or open spaces provided that such temporary constructions are so designed as not to interfere with proper ventilation.
