Investment Company Act of 1940 - Section 2(a)(5)
Definition of Bank
"Bank" means:
(A) a banking institution organized under the laws of the United States,
(B) a member bank of the Federal Reserve System,
(C) any other banking institution or trust company, whether incorporated or not, doing business under the laws of any State or of the United States, a substantial portion of the business of which consists of receiving deposits or exercising fiduciary powers similar to those permitted to national banks under the authority of the Comptroller of the Currency, and which is supervised and examined by State or Federal authority having supervision over banks, and which is not operated for the purpose of evading the provisions of this Title, and
(D) a receiver, conservator, or other liquidating agent of any institution or firm included in clauses (A), (B), or (C) of this paragraph.