MARC 21 Concise Format for Holdings Data: 506: Restrictions on Access Note (Network Development and MARC Standards Office, Library of Congress)

This is an ARCHIVED VERSION of the 2008 electronic edition of the MARC 21 Concise Formats. Please see loc.gov/marc/concise/ for the most up-to-date version of the electronic MARC 21 Concise Formats.

First - Restriction

# - No information provided

0 - No restrictions

1 - Restrictions apply

$a - Terms governing access (NR)

Legal, physical, or procedural restrictions imposed on individuals wishing to see the described materials.

$b - Jurisdiction (R)

Name of a person, an institution, or a position or function within the institution, by whom or which the terms governing access are imposed and/or enforced, and to whom the restriction may be appealed.

$c - Physical access provisions (R)

Arrangements required for physical access.

$d - Authorized users (R)

Class of users or specific individuals (by name or title) to whom the restrictions in subfield $a do not apply.

$e - Authorization (R)

Source of authority for the restriction.

$f - Standardized terminology for access restriction (R)

Data taken from a standardized list of terms indicating the level or type of restriction.

$u - Uniform Resource Identifier (R)

Uniform Resource Identifier (URI), for example a URL or URN, which provides electronic access data in a standard syntax. The data that is accessed by the URI contains additional information about access restrictions.

$2 - Source of term (NR)

MARC code that identifies the source of the term used to record the restriction in subfield $f. If different sources are recorded, separate fields should be used. Code from: MARC Code Lists for Relators, Sources, Description Conventions.

$5 - Institution to which field applies (NR)

See description of this subfield in Appendix A: Control Subfields.

$6 - Linkage (NR)

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number (R)

See description of this subfield in Appendix A: Control Subfields.


506	0#$aAccess copy available to the general public.$fUnrestricted$2star $5MH


506	1#$aClassified.


506	##$aFor official use only.


506	1#$3Office files of Under Secretary$aNo one may examine these records or obtain information from them or copies of them except by written permission;$bSecretary of the Treasury or his duly authorized representative;$cKept in remote storage; access requires 24 hours advance notice.


506	##$aRestricted access;$cWritten permission required;$bDonor.


506	1#$aRestricted: cannot be viewed until 2010;$dMembers of donor's family.


506	##$aClassified under national security provisions;$bDepartment of Defense;$eTitle 50, chapter 401, U.S.C.


506	0#$aAccess copy available to the general public.$fUnrestricted$2star $5MH


506	##$fUnrestricted online access$2star


506	##$3Use copy$aAccess available to account holders only.$fOnline access with authorization$2star


506	##$3Use copy$aIn copyright material. Searches will return text snippets only.$fPreview only$2star


506	##$aClosed until January 1, 2068.$fNo online access$2star


506	##$3Master copy$fNo online access$2star


506	##$aSome restrictions apply. Consult restricted access file for restriction details:$u[URI]


506	1#$aAccess restricted to users with a valid Harvard ID.$fLicense$2star $5MH

506 - Restrictions on Access Note (R)