Section 39(1)(b) in The Unlawful Activities (Prevention) Act, 1967
(b)who, with intention to further the activity of a terrorist organisation, arranges, manages or assists in arranging or managing a meeting which he knows is—(i)to support the terrorist organization; or(ii)to further the activity of the terrorist organization; or(iii)to bead dressed by a person who associates or professes to be associated with the terrorist organisation; or