Board of Governors of the Federal Reserve System (U.S.), 1935-. "Request for comment on FRB ACH transactions : Attachment 1" in Press Releases of the Board of Governors of the Federal Reserve System
(May 18, 1999).
https://fraser.stlouisfed.org/title/9237/item/674666/content/pdf/frsbog_pr_19990518b-1, accessed on September 7, 2026.