Federal Reserve Bank of Dallas. "Fed Standard Time, Circular No. 81-150," District Notices (Federal Reserve Bank of Dallas) (July 22, 1981). https://fraser.stlouisfed.org/content/?item_id=541332&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19810722_no81-150.pdf, accessed on May 27, 2018.
Fiscal Agency Operating Circular No. 2 Related. Fed Standard Time (FST), Effective 8-3-81. New Procedure to Prohibit Wire Transfer of Securities Message (CPD's) From Being Sent After Deadline.