12 CFR § 220.9 - Clearance of securities, options, and futures.
(a) Credit for clearance of securities. The provisions of this part shall not apply to the extension or maintenance of any credit that is not for more than one day if it is incidental to the clearance of transactions in securities directly between members of a national securities exchange or association or through any clearing agency registered with the SEC.
(b) Deposit of securities with a clearing agency. The provisions of this part shall not apply to the deposit of securities with an option or futures clearing agency for the purpose of meeting the deposit requirements of the agency if:
(1) The clearing agency:
(i) Issues, guarantees performance on, or clears transactions in, any security (including options on any security, certificate of deposit, securities index or foreign currency); or
(ii) Guarantees performance of contracts for the purchase or sale of a commodity for future delivery or options on such contracts;
(2) The clearing agency is registered with the Securities and Exchange Commission or is the clearing agency for a contract market regulated by the Commodity Futures Trading Commission; and
(3) The deposit consists of any margin security and complies with the rules of the clearing agency that have been approved by the Securities and Exchange Commission or the Commodity Futures Trading Commission.