(C) Extension Subject to a determination under subparagraph (B), an appropriate Federal banking agency may extend the 2-year period referred to in subparagraph (A) from time to time as to any particular insured depository institution for not more than 6 months at a time, if, in the judgment of the agency, such an extension would not be detrimental to the public interest, but no such extensions shall in the aggregate exceed 1 year. (4) Definitions For purposes of this subsection, the terms broker and dealer have the same meanings as in section 3(a) of the Securities Exchange Act of 1934 and the terms investment adviser and investment company have the meaning given such terms under the Investment Advisers Act of 1940 and the Investment Company Act of 1940, respectively. . (b) Prohibition on banking activities by securities firms clarified Section 21 of the Banking Act of 1933 ( 12 U.S.C. 378 ) is amended by adding at the end the following new subsection: (c) Business of receiving deposits For purposes of this section, the term business of receiving deposits includes the establishment and maintenance of any transaction account (as defined in section 19(b)(1)(C) of the Federal Reserve Act). . (c) Continued applicability of ICI v. Camp (1) In general The Congress ratifies the interpretation of the paragraph designated the Seventh of section 5136 of the Revised Statutes of the United States ( 12 U.S.C. 24 , as amended by section 16 of the Banking Act of 1933 and subsequent amendments) and section 21 of the Banking Act of 1933 ( 12 U.S.C. 378 ) by the Supreme Court of the United States in the case of Investment Company Institute v. Camp (401 U.S. 617 et seq. (1971)) with regard to the permissible activities of banks and securities firms, except to the extent expressly prescribed otherwise by this section. (2) Applicability of reasoning The reasoning of the Supreme Court of the United States in the case referred to in paragraph (1) with respect to sections 20 and 32 of the Banking Act of 1933 (as in effect prior to the