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Recent Site Updates

New Finding Aids are now available on eCFR.gov. The Parallel Table of Authorities, Subject Index, and Agency-prepared Indexes are now online! Learn more
Reader Aids

Reader Aids help people use and understand the eCFR. Reader Aids information is not published in the Code of Federal Regulations.

Reader aid items in this section

  • New Finding Aids on eCFR.gov
    We’re excited to announce the release of two Finding Aids on eCFR.gov — the Subject Index and the Parallel Table of Authorities. Both are now available online and, for the first time, both are updated in real time. Until now these compilations have been produced manually and, because of the effort involved, published only...
  • Introducing timeline filtering
    We’re thrilled to announce the release of timeline filtering for cross-references to the Federal Register. This feature will appear when you view timelines for sections that include cross-references in their history. The timeline provides a detailed record of how a section has changed over time. Cross-reference entries are...