If after the receipt of the notice given under Paragraph MAE-4.3.1, the licensed exchange or licensed market operator fails to take any action in relation to those securities or contracts on that market and the CBB continues to be of the opinion that it is necessary to prohibit trading in those securities or contracts on that market, the CBB may by notice in writing to the licensed exchange or licensed market operator, prohibit trading in those securities or contracts on that market for such period, as is specified in the notice.