This section applies to the following types of entities: Except as provided in this introductory text, a broker or dealer, including an OTC derivatives dealer as that term is defined in § 240.3b-12 registered pursuant to section 15 of the Act (15 U.S.C. 78 o); a broker or dealer, other than an OTC derivatives dealer, registered pursuant to section 15 of the Act that is also a security-based swap dealer registered pursuant to section 15F of the Act (15 U.S.C. 78 o-10); and a broker or dealer, including