Section 17 in The Vizagapatnam Harbour Craft Rules, 1950
17. Working of the Licensed Harbour Craft at night and in bad weather.
-(a)No licensed harbour craft shall ply in the outer roads(i)betwen the hours of 6 P.M. to 6 A.M. without the previous permission of the Deputy Port Conservator.(ii)when a storm warning signal indicating bad weather or high seas is displayed from the Port Flagstaff.(b)When the signal referred to in sub-clause (ii) of clause (a) is hoisted at the Port Flagstaff, all harbour craft plying in the outer roads shall return to the inner harbour at once and shall not proceed again to the outer roads without the special permission of the Deputy Port Conservator until the signal is hauled down.
