If a person manages investment accounts on a discretionary basis, relevant securities so managed will be treated, for the purpose of this rule, as controlled by that person and not by the person on whose behalf the relevant securities are managed. Except with the consent of the CBB, where more than one discretionary investment management operation is conducted in the same group, relevant securities controlled by all such operations will be treated for the purpose of this rule as those of a single person and must be aggregated.