Section 2(1)(xvii) in The Andaman and Nicobar Islands Port Rules, 2004
(xvii)"Petroleum vessel" means any vessel carrying more than 50000 liters or 5 metric tones of petroleum class "A" or 500000 liters or 50 metric tones of petroleum class "B" or any other substance having the same flash points as that of petroleum class "A" or class "B";