A Treasury Decision (TD) is a document that contains the text of the official rule of the Department of Treasury. The Department of Treasury issues TDs for the administration, application, and enforcement of IRS Regulations. TDs act as updates to the text already published in the Code of Federal Regulations (CFR) and include the applicability and effective date of the new regulation.
TDs may include either temporary regulations, which provide immediate guidance by the IRS, or final regulations, enforced after the IRS addresses public opinion on the temporary regulations. Moreso, final regulations may even be amended by temporary regulations within the same publication of a TD. TDs also retain legal authority and are binding (must be followed), on both taxpayers and the IRS. Treasury Decisions can be found in the Internal Revenue Bulletin; until 2008, they could be found in the Cumulative Internal Revenue Bulletin.
[Last updated in July of 2024 by the Wex Definitions Team]