Where a person has become a controller by virtue of their shareholding in contravention of Paragraph GR-5.1.1, or a notice of refusal has been served on them under Paragraph GR-5.4.1 and the period of appeal has expired, the CBB may, by notice in writing served on the person concerned, instruct the person concerned to transfer such shares, or refrain from exercising voting rights in respect of such shares.