If--
(a) the Commission finds that a ground of cancellation has been established, and
(b) that finding is made, wholly or mainly, because of the conduct of a particular class or group of members of the industrial organisation,the Commission may, if it considers it just to do so, instead of cancelling the registration of the industrial organisation, make a demarcation order under Part 6 so as to exclude from eligibility for membership of the industrial organisation persons belonging to the class or group.