The way you search for unpublished hearings is to type the word 'unpublished' in the search box on the advanced form and choose a date range. Rules dictate when unpublished hearings are released from the National Archives. Senate hearings are usually released after 20 years; House hearings after 30 years. The exception is hearings that include classified or sensitive material; they can be held for up to 50 years.
Resource TypesE-Books and E-Texts
DescriptionPublished and unpublished hearings from U.S. Congressional committee hearings proceedings. All hearings contain the full transcripts of the proceedings, including all oral statements, committee questions, and discussion. Published hearings also contain texts of related reports, statistical analyses, correspondence, exhibits, and articles presented by witnesses or inserted into the record by committee members and staff. For more recent hearings, see govinfo.