To search for a Federal Register Document Number, navigate to the Federal Register Library and select the Advanced Search option at the top of the main page. You will need to then use the Full Text field from the drop-down menu.
Example: “FR Doc. E6-21480”
You can also search using the one-box search bar the top of the page. From here you would type “FR Doc. E6-21480,” select the Just search for option from the drop-down and hit the search button.