The EAST Disclosure Policy states that "EAST Retention Partners will record EAST retention commitments in their local catalogs to prevent withdrawal of these volumes. Retention Partners will also disclose EAST retention commitments in regional and national/international systems (e.g., OCLC WorldCat) in ways that are consistent with emerging national or international standards."

The EAST 583 Working Group has created this site and the 583 Best Practices document to assist members in fulfilling this requirement.

Example: 

583 1b |a committed to retain |c 20160630 |d 20310630 |f EAST |u http://eastlibraries.org/retained-materials |5 {Marc Org Code}