17 CFR § 1.37 - Customer's name, address, and occupation recorded; record of guarantor or controller of account.
(a) Each futures commission merchant, retail foreign exchange dealer, introducing broker, and member of a contract market shall keep a record in permanent form which shall show for each commodity interest account carried or introduced by it the true name and address of the person for whom such account is carried or introduced and the principal occupation or business of such person as well as the name of any other person guaranteeing such account or exercising any trading control with respect to such account. For each such commodity option account, the records kept by such futures commission merchant, introducing broker, and member of a contract market must also show the name of the person who has solicited and is responsible for each customer's account or assign account numbers in such a manner to identify that person.
(b) As of the close of the market each day, each futures commission merchant which carries an account for another futures commission merchant, foreign broker (as defined in § 15.00 of this chapter), member of a contract market, or other person, on an omnibus basis shall maintain a daily record for each such omnibus account of the total open long contracts and the total open short contracts in each future and in each swap and, for commodity option transactions, the total open put options purchased, the total open put options granted, the total open call options purchased, and the total open call options granted for each commodity option expiration date.
(c) Each designated contract market and swap execution facility shall keep a record in permanent form, which shall show the true name, address, and principal occupation or business of any foreign trader executing transactions on the facility or exchange. In addition, upon request, a designated contract market or swap execution facility shall provide to the Commission information regarding the name of any person guaranteeing such transactions or exercising any control over the trading of such foreign trader.
(d) Paragraph (c) of this section shall not apply to a designated contract market or swap execution facility on which transactions in futures, swaps or options (other than swaps) contracts of foreign traders are executed through, or the resulting transactions are maintained in, accounts carried by a registered futures commission merchant or introduced by a registered introducing broker subject to the provisions of paragraph (a) of this section.