A member designated as a Restricted Firm shall be required, except as provided in paragraphs (e) and (f) of this Rule, to establish a Restricted Deposit Account and deposit in that account cash or qualified securities with an aggregate value that is not less than the member's Restricted Deposit Requirement, and shall be subject to such conditions or restrictions on the member's operations as determined by the Department to be necessary or appropriate for the protection of investors and in the pu