“subversive act” means any act which is intended, or is likely ,-
(i) to endanger public safety and tranquility,
(ii) to organise, further or help the illegal acquisition, possession or use of-
(a) arms, ammunition or military stores as defined in the Arms Act, 1959;
(b) explosive substances as defined in Explosive Substances Act, 1908, or corrosive substances;
(iii) to commit an offence of looting or raiding under this Act or to further or help the commission thereof.