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Using the eCFR Point-in-Time System

Reader Aids

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

Getting Started

The Electronic Code of Federal Regulations (eCFR) provides a way of exploring the Code of Federal Regulations as it exists today and at points in time back to January 2017.

The eCFR allows you to:

  • browse the Code of Federal Regulations as it existed at any point in time
  • compare the regulations as they existed on any two dates
  • view a timeline of how the CFR content has changed
  • search for specific terms
  • subscribe to changes in the regulations

The eCFR is not an official legal edition of the CFR. Understanding the eCFR explains its status and the editorial process.

Code of Federal Regulations

The Code of Federal Regulations (CFR) is the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. It is divided into 50 titles representing broad areas subject to federal regulation.

The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR and provides enhanced features that are not part of the published CFR

Digging Deeper