(h)the vessel or any steamer or tug towing or otherwise attending on such vessel exhibits conspicuously-(i)from sunrise to sunset a red flag not less than 90 centimetres square with a white circular centre 15 centimetres in diameter if petroleum Class A is carried and a red flag not less than 90 centimetres square if petroleum Class B is carried; and(ii)from sunset to sunrise such warning lights as may be required by the Conservator.
