Section 2(9)(b) in The West Bengal Security Act, 1950
(b)to organize, further or help the illegal acquisition, possession or use of—(i)arms, ammunition or military stores as defined in the Indian Arms Act, 1878 ( XI of 1878),(ii)explosive substances as defined in the Explosive Substances Act, 1908 ( VI of 1908), or(iii)corrosive substances