The Federal government (at least the executive and the legislative branches) began making substantial volumes of legislative and regulatory materials available freely on the Web as early as the late 1990's. While the resources provided directly by the U.S. government have not always been the most user friendly, they have always been truly rich in content. After a decade, today the interfaces have improved vastly and the content has grown exponentially. Current legislative and regulatory material is routinely available, as well as many historical items of importance.
Cahill, Maureen, "Scoping Out Uncle Sam: Federal Legal and Government Resources" (2008). Presentations. Paper 43.