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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.

eCFR Changes through time

Timeline of Changes to a Part/Section

Timeline views allow you to compare changes to eCFR content across time. When viewing content, the timeline utility menu item on the left side of the document will allow you to view all changes to the content within the system.

The timeline view gives you an overview of all changes (starting 2017) to the content you are viewing. The links allow you to directly navigate to a view of the content on a date in the past, see a comparison view showing the change introduced on a date, or a comparison to the current content of CFR.

Viewing Historical Content

By default, the version of the content shown in eCFR is the current version as is indicated in the blue bar in the screenshot above. You can also view the content as it was in the past by clicking on the “view historical versions” link or on the calendar “Go to Date” icon.

Clicking either of those will open up a pane where you can enter a date. Entering “01/01/2018” takes you to the page in the following screenshot (live version here.) Note the yellow bar indicating historical content and the date that you selected and the altered content. Below we will show you how to inspect what content is altered in Compare Dates View.

Comparing Changes Through Time

You can compare content on two dates in several ways. You can “view change introduced,” or “compare to most recent” from the timeline view as above, or you can compare any two dates by clicking on the “Compare Dates” tab on the left navigation bar.

For example clicking on the “view change introduced” link in the last section will show you a page like the screenshot below. There is a note at the top of the indicating what versions of the content you are viewing. Content that has been removed from the later version is indicated on a red background with strikethrough text, content that has been added is on a green background.

eCFR view showing an introduced change

The “eCFR Changes” bar at the bottom of the page allows you to quickly go to the next or previous group of changes, or if you are at the last of the changes, to go to the top of the page.

The “Compare Dates” menu gives you options to change the dates you are comparing as well as customize the display of changes.

Recent Changes

You can view all recent changes to titles, chapters, and subchapters in two ways. From the table of contents, if you click on the Timeline navigation button, you will see that although “Timeline views are not currently available for tables of contents” you can view a list of all recent changes by clicking a link.

This will show you a listing of the content areas below that level that have recently changed.

From there you can navigate to the individual sections of content that have changed in the Comparison View.

You can also navigate to Recent Changes from the top navigation

or from the home page you can see get a link to all changes to a title for the previous six months by clicking on “view changes.”

Subscribing to Changes

You can create a subscription to view any eCFR content by clicking on the “Subscribe” link on a page of interest.

If you do not have an eCFR account you will be asked to create one. Subscribing will cause eCFR to send you email whenever the selected content has changed. If you are logged in, you can manage your subscriptions via the “My eCFR >> My Subscriptions” link. You can also subscribe to search results.