The United States Statutes are a combination of legal and permanent evidence of the laws the congress enact during their session. It is published through the direction of the office of the Federal Register and the concurrent resolutions, proposed and ratified amendments and the presidents' proclamations are found in it.
When needed in electronic format, it can be rightly gotten from www.govinfo.gov without any fee to be paid and the paper version can be bought from the Superintendent of Documents
.