Electronic and Postal Communications (Electronic Communication Numbering and Addressing) G.N. No. 428 (contd) (tzNIC) shall serve both as the technical and administrative Manager of dot-tzccTLD. (4) Any domain name with dot-tzccTLD shall be registered by tzNIC or Accredited Registrars; (5) The Tanzania Network Information Centre (tzNIC) shall from time to time publish the list of accredited registrars on its website. dot-tz electronic addresses and names data base manager and accredited registrars obligations 11.(1) -All entities assigned with internet resources by the Regional Internet Registries (RIRs) shall submit to tzNIC on a monthly basis both assigned and in use Internet Protocol (IP) addresses. (2) The tzNIC shall maintain an updated National Data Base of any IP addresses in use and registered domain names in the United Republic. (3) The tzNIC shall after every three months starting January, 2012 submit to the Authority information on the assigned IP addresses and registered domain Names within that period. Changes of electronic communication numbering 12. In the event that the numbering plan has to change, the Authority shall issue notice to the public and the assignees at least six (6) months prior to the date of change. Cancellation of electronic communication numbers and addresses assignments 13.-(1) Where an assignee fails to use an electronic communication number assigned by the Authority or fails to pay annual fees, he shall be required to submit to the Authority reasons for such failure, of which the Authority may take regulatory measures including cancellation of the assignment. (2) Where an Assignee fails to renew an electronic address registered by tzNIC, the domain name will automatically be deleted from the Registry. 165