17 CFR § 31.17 - Records of leverage transactions.
(a) Each leverage transaction merchant receiving a leverage customer's order shall immediately upon receipt thereof prepare a written record of such order, including the account identification and order number, and shall record thereon, by time-stamp or other timing device, the date and time, to the nearest minute, such order is received.
(b) Each leverage transaction merchant executing the order of a leverage customer shall record on a written record of such order, including the account identification and order number, by time-stamp or other timing device, the date and time, to the nearest minute, such order is executed.
(c) For the purposes of this section, the term “order” shall include, but not be limited to, any order for the purchase, sale, repurchase, resale, rescission, settlement by delivery, or liquidation of a leverage contract.
(d) Each leverage transaction merchant shall establish and maintain a record of the bid and ask prices of each leverage contract on each leverage commodity that the leverage transaction merchant offers to sell or sells, or offers to purchase or purchases. The record shall include the times these prices were in effect to the nearest ten seconds.