Terrorism Bill

My hon. Friend the Member for Islington, North (Jeremy Corbyn) referred to the Tamil Tigers, and he will recall that they were proscribed under the Terrorism Act 2000, based on their behaviour before that act came into force. Colleagues were critical of that decision. Is it my hon. Friend’s understanding of clause 21 of the Bill that conduct carried out only after the Bill receives Royal Assent will be considered when assessing whether a group should be proscribed, and that the group’s conduct will not be assessed retrospectively?