As of December 1, 1999, CORE has introduced the Uniform Dispute Resolution Policy (UDRP) specified by the Internet Corporation for Assigned Names and Numbers (ICANN) . This policy replaces the initial CORE Dispute Resolution Policy, based on the provisions for a change in policy contained in that document. The ICANN UDRP, along with the Rules for Uniform Dispute Resolution Policy is compulsory for all ICANN-accredited registrars.