Section 76 in The Inland Steam Vessels (Madhya Pradesh) Rules, 1962
76.
If the motor and fuel tanks are situated below' deck, they shall be confined within a separate water-tight and well ventilated compartment. The compartment shall be furnished with at least two cowl ventilators so arranged as to prevent the accumulation of vapour in the lower part of the space, to which part one of the ventilators shall extend. Any enclosed space, within which the motor or tank is placed shall be ventilated in like manner except in the case of small open launches where louvers, or other suitable openings can be provided in which case one cowl ventilator will suffice.
