Section 10(10) in The Madras Port Petroleum Rules, 1963
(10)The Master of every vessel, other than harbour craft or country craft carrying cased dangerous petroleum as cargo shall, whilst in the port, hoists a red flag at the fore, where it can be best seen. Such flags shall be kept flying from sunrise to sunset, as long as the cased petroleum is on board the vessel. Such vessels shall exhibit, between sunset and sunrise, a red light at the fore.
