Agency-assigned data element:

An agency-assigned data element is one whose content is determined by a designated agency and is the responsibility of that agency, for example, field 010 (Library of Congress Control Number) . While it is usually input by the designated agency, it may be transcribed by another organization. However, when the content designation and transcription of the agency-assigned data is performed by another organization, the responsibility for these functions is determined by the Responsible Parties Rule .