Within NEPA's role as the federal procedural environmental statute, issues of statutory interpretation come into play on a fairly regular basis in order to to assist in clarifying the various terminology used in the statute. However, because of this need there are numerous compiled legislative histories that are available in both print and electronic formats for the original Act. These compiled histories are typically indexed, sometimes searchable and are incredibly efficient. For the purposes of conducting NEPA legislative history research, the following Public Law Numbers and Statutes at Large citations are required:
Legislative History materials are currently only available on Lexis.com. To access select the "View More" link next to the "Federal Legal - U.S." header. Once selected, scroll down to the "Find Statutes, Regulations, Administrative Materials & Court Rules" header. At the bottom click on the link for "Legislative History Materials;" next scroll down to view.