17 CFR § 31.19 - Unlawful representations.
It shall be unlawful for any person:
(a) Required to be registered with the Commission in accordance with §§ 3.17 and 3.18 of this chapter expressly or impliedly to represent that the commission, by registering that person or by registering the leverage commodity which underlies contracts offered for sale or purchase, or sold or purchased by that person, or otherwise, has directly or indirectly approved that person, the person's method of operation, or any leverage commodity or leverage contract solicited or accepted by that person;
(b) To represent in writing that it is registered with the Commission or that it is offering any leverage commodity registered with the Commission without also stating in writing in connection with that representation that the Commission, by registering that person or the leverage commodity which underlies contracts offered for sale or purchase or sold or purchased by that person, has not directly or indirectly approved the person, the person's method of operation, or any leverage commodity or contract solicited or accepted by that person; or
(c) In or in connection with an offer to enter into, the entry into, the confirmation of the execution of, or the maintenance of any leverage contract, expressly or impliedly to represent that compliance with the provisions of the Act and these regulations constitutes a guarantee of the fulfillment of the leverage contract.