municipal securities dealer
(30) The term “municipal securities dealer” means any person (including a separately identifiable department or division of a bank) engaged in the business of buying and selling municipal securities for his own account, through a broker or otherwise, but does not include— (A) any person insofar as he buys or sells such securities for his own account, either individually or in some fiduciary capacity, but not as a part of a regular business; or (B) a bank, unless the bank is engaged in the business of buying and selling municipal securities for its own account other than in a fiduciary capacity, through a broker or otherwise: Provided, however, That if the bank is engaged in such business through a separately identifiable department or division (as defined by the Municipal Securities Rulemaking Board in accordance with section 78o–4(b)(2)(H) of this title ), the department or division and not the bank itself shall be deemed to be the municipal securities dealer.