Section 4 amends section 3 of the Offences Against the State (Amendment) Act 1972. The effect of the 1972 provision is that any statement or conduct by a person accused of membership of an unlawful organisation implying or leading to a reasonable inference that he was at a material time a member of such an organisation should be evidence that he or she was then such a member. It originally defined the expression "conduct" as including an omission by an accused person to deny published reports that he was a member of an unlawful organisation. The change made by section 4 of the 1998 Act was to expand the definition of "conduct" to include movements, actions, activities or associations. This simply aligns the definition of the word in the 1972 Act with the reference to movements, actions, activities or associations used in section 2 of the 1998 Act.