Answer:
Search results display documents posted on Regulations.gov. These documents include Federal Register publications, scientific and technical findings, comments and other regulatory documents. Once you enter a keyword(s), Docket ID or Document ID, the search engine looks for matches in specific document data, such as the Document ID, title, associated RINs, and other identifiers, in addition to document text. Documents which include a keyword or Document ID that is found more than once will be displayed first in the Search Results.
Most users visit Regulations.gov to submit comments on proposed regulations and other regulatory documents open for comment. Therefore, by default, those documents are placed at the top of the results.
To refine your search results use one or more filters displayed to the left, sort by the options available in the drop-down menu, and/or enter another keyword to search within your existing results.