17 CFR §1.40

Each futures commission merchant, each retail foreign exchange dealer, each introducing broker, and each member of a contract market or a swap execution facility shall, upon request, furnish or cause to be furnished to the Commission a true copy of any letter, circular, telecommunication, or report published or given general circulation by such futures commission merchant, retail foreign exchange dealer, introducing broker, member or eligible contract participant which concerns crop or market information or conditions that affect or tend to affect the price of any commodity, including any exchange rate, and the true source of or authority for the information contained therein.