National Postal Policy provided. The major courier operators utilize computer technology in their acceptance and delivery services, as well as in tracking-andtracing mail consignments. 2.7. The Public Postal Operator has taken measures to assure security for postal items handled through its network by establishing a specialized unit. Measures taken include the use of electronic surveillance machines which are capable of monitoring theft, violation of postal articles and detecting some dangerous and prohibited articles sent through the post. TPC has also been cooperating with national security agencies, regional and international counterpart organizations in strengthening postal security. 2.8. The United Republic of Tanzania is signatory to the Universal Postal Union and the Pan African Postal Union Conventions, both of which are international treaties on the operation of postal services. Tanzania is also a signatory to the Southern African Development Co-operation Protocol on Transport, Communications and Meteorology which has provisions for coordination in postal services. Regional and international collaboration with other international bodies in postal services has also been vigorously pursued. Ministry of Communications and Transport 5