Where the CBB has reason to believe that an emergency exists, or thinks that it is necessary or expedient in the interests of the public or a section of the public or for the protection of investors, the CBB may direct by notice in writing a licensed member to take such action as it considers necessary to maintain or restore a fair, transparent and efficient market related to the trading, clearing, settlement and depository of any securities or futures contracts, or any class of securities or futures contracts that are undertaken by any licensed member.