# Treas. Reg. § 1.581-1: Banks.

Source: eCFR as of 2026-10-19 <https://www.ecfr.gov/current/title-26/section-1.581-1>. Interprets 26 U.S.C. § 581.

(a) In order to be a bank as defined in section 581, an institution must be a corporation for federal tax purposes. See § 301.7701-2(b) of this chapter for the definition of a corporation. 

(b) This section is effective as of January 1, 1997. 

[T.D. 8697, 61 FR 66588, Dec. 18, 1996]