LibraryJournal.com has an article about this policy including a customer
service number libraries can call to request the issue.

http://www.libraryjournal.com/article/CA6422612.html

Regina 	R. Reynolds                     email: rrey@loc.gov
Head, National Serials Data Program     voice: (202) 707-6379
Library of Congress                     fax    (202) 707-6333
101 Independence Avenue, S.E.           ISSN Web page: lcweb.loc.gov/issn/
Washington, D.C. 20540-4160