Code of Federal Regulations Title 17. Commodity and Securities Exchanges § 17.240.11a–1 Regulation of floor trading

(1) Any transaction by a registered specialist in a security in which he is so registered on such exchange;

(2) Any transaction for the account of an odd-lot dealer in a security in which he is so registered on such exchange;

(3) Any stabilizing transaction effected in compliance with § 242.104 of this chapter to facilitate a distribution of such security in which such member is participating;

(4) Any bona fide arbitrage transaction;

(5) Any transaction made with the prior approval of a floor official of such exchange to permit such member to contribute to the maintenance of a fair and orderly market in such security, or any purchase or sale to reverse any such transaction;

(6) Any transaction to offset a transaction made in error;  or

(7) Any transaction effected in conformity with a plan designed to eliminate floor trading activities which are not beneficial to the market and which plan has been adopted by an exchange and declared effective by the Commission. For the purpose of this rule, a plan filed with the Commission by a national securities exchange shall not become effective unless the Commission, having due regard for the maintenance of fair and orderly markets, for the public interest, and for the protection of investors, declares the plan to be effective.