Who can use the service? The archive service is open to researchers in all fields on justification of their research. The archives can only be consulted on the premises. Document release dates : Specific blackout periods (private establishments). The release dates for documents vary according to the nature and subject of the archives. The period ranges from 60 to 150 years (for files of a medical nature), except for documents that are public by nature, which can be consulted without restrictions or delays. In some cases, it is possible to request a derogation for certain documents that are less than 60 years old, but at least 30 years. Only documents that have been sorted or examined by our services in advance can be made public. Inventories are available in the reading room. A permanently enriched database is currently being created. It is not open to the public. Limited photocopying is possible depending on the subject and nature of the document, excluding bound works. Photocopies can be made free of charge (within reasonable limits) on a personal basis and cannot be passed on to a third party. Reproduction rights are not authorised.