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What the IRB is
The Internal Revenue Bulletin is the authoritative instrument by which the Internal Revenue Service publishes its official position on published guidance items. Revenue Rulings, Revenue Procedures, Treasury Decisions, Notices, and Announcements are all promulgated in the Bulletin. What appears in the Bulletin is what the Service has published; anything else is not.
What the IRB is not
“Not everything the IRS says is in the Bulletin. And not everything the IRS says outside the Bulletin carries the same weight as what is in it.”
The IRS publishes a very large body of explanatory material — instructions to forms, publications, news releases, taxpayer-facing FAQs, and web pages. That material is often useful and often accurate, but it is not the Internal Revenue Bulletin, and the Service itself is clear that it does not carry the same authority as guidance published in the Bulletin.
How to read an issue of the Bulletin
A weekly issue of the Internal Revenue Bulletin has a fixed internal structure. Part I contains Rulings and Decisions under the Internal Revenue Code. Part II covers Treaties and Tax Legislation. Part III consists of Administrative, Procedural, and Miscellaneous items — this is where most Notices and Revenue Procedures appear. Part IV contains Items of General Interest.
The Bulletin also carries a Finding List of prior published items that are modified, superseded, or otherwise affected by the current issue. The Finding List is how the Service records the moving relationships between published items — it is the primary mechanism by which the Bulletin functions as a self-updating record.
