17 C.F.R. § 190.06
(2) Delivery made or taken on behalf of a customer outside of the administration of the debtor's estate.
(i) The trustee shall use reasonable efforts to allow a customer to deliver physical delivery property that is held directly by the customer and not by the debtor (and thus not recorded in any commodity contract account of the customer) in settlement of a commodity contract, and to allow payment in exchange for such delivery, to occur outside the administration of the debtor's estate, when the rules of the exchange or other market listing the commodity contract, or the clearing organization or the foreign clearing organization clearing the commodity contract, as applicable, prescribe a process for delivery that allows the delivery to be fulfilled:
(3) Delivery as part of administration of the debtor's estate. When the trustee determines that it is not practicable to effect delivery as provided in paragraph (a)(2) of this section:
(i) To facilitate the making or taking of delivery directly by a customer, the trustee may, as it determines reasonable under the circumstances of the case and consistent with the pro rata distribution of customer property by account class:
(B) When a customer is obligated to take delivery:
(1) Return any cash delivery property to the customer that is reflected in the customer's delivery account, provided that cash delivery property returned under this paragraph (a)(3)(i)(B)(1) shall not exceed the lesser of:
(i) The amount the customer is required to pay for delivery of the commodity; or
(ii) The customer's net funded balance for all of the customer's commodity contract accounts;
(2) Return cash, securities, or other property held in the customer's non-delivery commodity contract accounts, provided that property returned under this section shall not exceed the lesser of:
(i) The amount the customer is required to pay for delivery of the commodity; or
(ii) The net funded balance for all of the customer's commodity contract accounts reduced by any amount returned to the customer pursuant to paragraph (a)(3)(i)(B)(1) of this section, and provided further, however, that the trustee may distribute such property only to the extent that the customer's funded balance for each such account exceeds the minimum margin obligations for such account (as described in § 190.04(b)(2)); and
(ii) If the trustee does not return physical delivery property, cash delivery property, or other property in the form of cash or cash equivalents to the customer as provided in paragraph (a)(3)(i) of this section, subject to paragraph (a)(4) of this section:
(B) When taking delivery of physical delivery property:
(1) The trustee shall pay for the delivery first using the customer's cash delivery property or other property, limited to the amounts set forth in paragraph (a)(3)(i)(B) of this section, along with any cash transferred by the customer to the trustee on or after the filing date for the purpose of paying for delivery.
(2) If the value of the cash or cash equivalents that may be used to pay for deliveries as described in paragraph (a)(3)(i)(B) of this section is less than the amount required to be paid for taking delivery, the trustee shall issue a payment call to the customer. The full amount of any payment made by the customer in response to a payment call must be credited to the funded balance of the particular account for which such payment is made.
(3) If the customer fails to meet a call for payment under paragraph (a)(3)(ii)(B)(2) of this section before payment is made for delivery, the trustee must convert any physical delivery property received on behalf of the customer to cash as promptly as possible.
(b) Special account class provisions for delivery accounts.
(1) Within the delivery account class, the trustee shall treat—
(2)
(i) If the debtor holds any cash or cash equivalents in an account maintained at a bank, clearing organization, foreign clearing organization, or other person, under a name or in a manner that clearly indicates that the account holds property for the purpose of making payment for taking delivery, or receiving payment for making delivery, of a commodity under commodity contracts, such property shall (subject to § 190.09) be considered customer property—
(ii) Any other property (excluding property segregated for the benefit of customer in the futures, foreign futures or cleared swaps account class) that is traceable as having been held or received for the purpose of making delivery, or as having been held or received as a result of taking delivery, of a commodity under commodity contracts, shall (subject to § 190.09) be considered customer property—