1.4.Each Licensee has an obligation to provide security protection for its secure information system (“the Network”) used to access the Publications and to restrict access to Authorised Users and warrants that it will use best endeavours to ensure the integrity of the Publications and the security of its Network. The Licensees restrict access to the electronic versions of Publications by maintaining a list of the IP addresses of Authorised Users from which access to the electronic versions of Publications will be permitted.