Section 3(1)(b) in The Prevention Of Terrorism Act, 2002
(b)is or continues to be a member of an association declared unlawful under the Unlawful Activities (Prevention) Act, 1967 (37 of 1967), or voluntarily does an act aiding or promoting in any manner the objects of such association and in either case is in possession of any unlicensed firearms, ammunition, explosive or other instrument or substance capable of causing mass destruction and commits any act resulting in loss of human life or grievous injury to any person or causes significant damage to any property, commits a terrorist act.