law: 13.Punishment for unlawful activities.-
  (1) Whoever- (a) takes part in or commits, or
  (b) advocates, abets, advises or incites the commission of, any unlawful activity, shall be punishable with imprisonment for a term which may extend to seven years and shall also be liable to fine.
  (2) Whoever, in any way, assists any unlawful activity of any association, declared unlawful under section 3, after the notification by which it has been so declared has become effective under sub-section(3) of that section, shall be punishable with imprisonment for a term which may extend to five years, or with fine, or with both.
  (3) Nothing in this section shall apply to any treaty, agreement or convention entered into between the Government of India and the Government of any other country or to any negotiations therefor carried on by any person authorised in this behalf by the Government of India.