Section 10D(c) in The Export (Quality Control And Inspection) Act, 1963
(c)if it becomes necessary to stop any conveyance or animal, he may use all lawful means for stopping it and where such means fail, the conveyance or animal may be fired upon, and where he is satisfied that it is necessary so to do to prevent the contravention of any provision of this Act, he may seize such conveyance or animal.