The Library of Congress is the maintenance agency for the value list upon which this online help is based.  Requests for the assignment of new codes and questions about existing code assignments should be sent to the:  Network Development and MARC Standards Office, Library of Congress, 101 Independence Avenue, S.E., Washington, DC 20540-4402; Fax: +1-202-707-0115; Email:  Requests for additions to the value list should include an explanation and justification.

Notices announcing additions or changes to assigned codes and their related citations are made public prior to the date they should be used in records in MARC News and Announcements at

See also: