Any member, participant or person who acquires the beneficial ownership in securities, must keep such records of every change in beneficial ownership which has been effected by the member, or by the participant, or by the person that has acquired the beneficial ownership in the securities, for a period of five years as may be required to enable the member, participant or the person that has acquired the beneficial ownership in the securities, as the case may be, to observe the requirements of this Act and to enable the Commissioner to be satisfied that those requirements have been observed.