A few boxes contain personal financial information and may not be used by researchers without the express permission of John C. Culver. Otherwise, the collection is open for research.

Note on Committee Records: Committee files are part of the official records of the United States Congress and are governed by the rules of the House of Representatives or the Senate and the rules of the particular committee. Under the rules of the House, unpublished records are closed for at least 30 years; under Senate rules, unpublished records are closed for at least 20 years. Both the House and the Senate close for at least fifty years any records concerning national security, committee investigations, and the privacy of living persons. Committee records are not automatically opened at the expiration of the years stated above; instead, they remain close until declared open by the committee with appropriate jurisidiction over the records. To ensure that access to these records is allowed, contact the chief clerk of the appropriate committee.