CORPORATIONS ACT 2001 - SECT 608. Relevant interests in securities. Basic rule--relevant interest is holding, or controlling voting or disposal of, securities. (1) A person has a relevant interest in securities if they: (a) are the holder of the securities; or. (b) have power to exercise, or control the exercise of, a right to vote attached to the securities; or. (c) have power to dispose of, or control the exercise of a power to dispose of, the securities.