Federal Reserve Bank of Dallas. "Regulation Z - Truth in Lending, Circular No. 80-43," District Notices (Federal Reserve Bank of Dallas) (March 13, 1980). https://fraser.stlouisfed.org/scribd/?item_id=540969&filepath=/files/docs/historical/frbdal/circulars/frbdallas_circ_19800313_no80-043.pdf&start_page=1, accessed on September 26, 2017.
Regulation Z Amendment, Dated March 1980. Delays Revocation of 3-31-80 Amendment and Interpretation Until 5-31-80.