17 CFR § 1.36 - Record of securities and property received from customers.
(a) Each futures commission merchant and each retail foreign exchange dealer shall maintain, as provided in § 1.31, a record of all securities and property received from customers or retail forex customers in lieu of money to margin, purchase, guarantee, or secure the commodity interests of such customers or retail forex customers. Such record shall show separately for each customer or retail forex customer: A description of the securities or property received; the name and address of such customer or retail forex customer; the dates when the securities or property were received; the identity of the depositories or other places where such securities or property are segregated or held; the dates of deposits and withdrawals from such depositories; and the dates of return of such securities or property to such customer or retail forex customer, or other disposition thereof, together with the facts and circumstances of such other disposition. In the event any futures commission merchant deposits with a derivatives clearing organization, directly or with a bank or trust company acting as custodian for such derivatives clearing organization, securities and/or property which belong to a particular customer, such futures commission merchant shall obtain written acknowledgment from such derivatives clearing organization that it was informed that such securities or property belong to customers of the futures commission merchant making the deposit. Such acknowledgment shall be retained as provided in § 1.31.
(b) Each derivatives clearing organization which receives from members securities or property belonging to particular customers of such members in lieu of money to margin, purchase, guarantee, or secure the commodity interests of such customers, or receives notice that any such securities or property have been received by a bank or trust company acting as custodian for such derivatives clearing organization, shall maintain, as provided in § 1.31, a record which will show separately for each member, the dates when such securities or property were received, the identity of the depositories or other places where such securities or property are segregated, the dates such securities or property were returned to the member, or otherwise disposed of, together with the facts and circumstances of such other disposition including the authorization therefor.