RIN Number in the Federal Register

The short version

A RIN is a Regulation Identifier Number. It is a tracking number for a regulatory action listed in the Unified Agenda and Regulatory Plan.

If you already have a RIN, use it as a stable handle for the rulemaking. Search it on RegInfo.gov to find the Unified Agenda entry, agency, stage, abstract, timetable, legal authority, and related planning details. Search it on FederalRegister.gov to find proposed rules, final rules, notices, corrections, withdrawals, delays, and comment-period extensions that list that RIN. Search it on Regulations.gov to find the docket when the agency uses that system and has connected the rulemaking record there.

A RIN is useful because it usually follows the regulatory action through the rulemaking process, not just one publication. A docket ID points to a public record where comments and supporting materials may live. A Federal Register citation points to one published document. A CFR citation points to codified regulatory text after rules are organized in the Code of Federal Regulations. For serious tracking, keep all four when they are available.

What a RIN tells you

The Regulatory Information Service Center assigns RINs for regulatory actions listed in the Unified Agenda. The same RIN is used to help the public follow the action in the Unified Agenda, the Federal Register, and RegInfo.gov.

• The usual format is NNNN-AANN, such as 1218-AC20. The first four digits identify the agency or subagency code. The last four characters identify the action within that agency's rulemakings.
• The RIN identifies a regulatory action, not a specific Federal Register document, docket, CFR section, OMB control number, or statute.
• OMB has asked agencies to include RINs in the headings of rule and proposed rule documents published in the Federal Register. Still verify matches because titles, dockets, CFR parts, and related actions can change over time.
• A RIN does not prove that a rule is final, open for comment, legally effective, or binding on your organization. It only helps connect records about the same regulatory action.

Use the RIN to avoid losing the thread when a title changes, an agency publishes a supplemental proposal, a deadline is extended, a proposal is withdrawn, or a final rule appears months after the original proposal. If the issue matters, confirm the match by comparing the agency, title, docket ID, CFR parts affected, and legal authority listed in the official documents.

How to track a rule by RIN

Start with the RIN, then build a watch list around the official identifiers that appear with it.

• Search the RIN on RegInfo.gov to read the Unified Agenda entry and see the agency, stage, abstract, timetable, CFR citation, and legal authority when those fields are provided.
• Search the RIN on FederalRegister.gov and filter by agency, date, or document type if the result set is noisy.
• Open each Federal Register result and check whether it is a proposed rule, final rule, notice, correction, withdrawal, extension, delay, or other document.
• For proposed rules and notices that request comments, record the comment deadline from the DATES section and the submission instructions from the ADDRESSES section. Comment periods vary, and later Federal Register documents can extend or reopen them.
• Open the linked docket on Regulations.gov when available. Save the docket ID, supporting materials, public comments, and the document page used for formal comment submission.
• Create a free RegWatch watch using the RIN plus the agency name, docket ID, CFR part, and topic words so new Federal Register matches reach you by email.

Do not rely on the Unified Agenda timetable as a compliance or comment deadline. The Agenda is a planning source. The Federal Register document and the agency docket are where you confirm public-comment deadlines, effective dates, compliance dates, and submission methods.

RIN, Federal Register, docket, and CFR

Each identifier answers a different question. Mixing them up is how teams miss comment windows or cite the wrong source.

The Federal Register is the daily publication for presidential documents and agency documents, including proposed rules, final rules, notices, and related items. A proposed rule usually explains what the agency plans to do and asks for public comment before the agency decides whether to issue a final rule. A final rule sets out the adopted regulatory text or action, gives an effective date when applicable, identifies authority, and often discusses significant comments received. A notice may announce meetings, information collections, petitions, extensions, guidance availability, or other agency actions.

Regulations.gov is the public docket system for many federal agencies, but not every agency docket or supporting record is available there. The CFR is different again: it organizes general and permanent federal regulations after final rules are codified. If you are tracking a rule before it is final, the Federal Register document and the docket usually matter more than the CFR. If you are checking current binding regulatory text, confirm the current CFR section and any later Federal Register amendments.

For background on the publication itself, see What is the Federal Register?. For a broader tracking workflow, browse the RegWatch guide library.