7 U.S.C. § 6j: Restrictions on dual trading in security futures products on designated contract markets and registered derivatives transaction execution facilities

shall provide that the prohibition of dual trading thereunder shall take effect upon issuance of the regulations; and exceptions for spread transactions and the correction of trading errors; allowance for a customer to designate in writing not less than once annually a named floor broker to execute orders for such customer, notwithstanding the regulations to prohibit the privilege of dual trading required under this section; and other measures reasonably designed to accommodate unique or special characteristics of individual boards of trade or contract markets, to address emergency or unusual market conditions, or otherwise to further the public interest consistent with the promotion of market efficiency, innovation, and expansion of investment opportunities, the protection of investors, and with the purposes of this section. the account of such floor broker; an account for which such floor broker has trading discretion; or an account controlled by a person with whom such floor broker has a relationship through membership in a broker association. engage in floor brokerage activity on behalf of the same employer, have an employer and employee relationship which relates to floor brokerage activity, share profits and losses associated with their brokerage or trading activity, or regularly share a deck of orders.