Federal Reserve Bank of Dallas. "Revised Schedule of Operating Hours for the Transfer and Settlement of Funds, Effective May 1, 1981; Revised Schedule of Operating Hours for New Settlement Arrangements, Effective May 1, 1981, Circular No. 81-88," District Notices (Federal Reserve Bank of Dallas) (April 30, 1981). https://fraser.stlouisfed.org/title/5569/item/541271, accessed on May 22, 2025.