Except with the consent of the CBB, where the incorrect or misleading statement concerned relates to the price of a possible offer (or a particular exchange ratio in the case of a proposed securities exchange offer), the potential offeror will not be allowed subsequently to make an offer for the offeree company at a lower price (taking the price of any securities concerned at the date of announcement of the firm intention to make the offer), unless there has occurred an event which the potential offeror specified in the statement as an event which would enable it to be set aside.