on-line track and trace system Electronic Data Inter-Change (EDI) for customer information and expedited inquiry handling systems; (d) conducting joint market research activities with a view to launching new postal products or services; (e) introducing appropriate postal security systems and procedures in the postal networks; and (f) co-operating in the development and design of relevant human resources training and development programmes. ARTICLE 99 Telecommunications The Partner States shall; (a) adopt common telecommunications policies to be developed within the Community in collaboration with other relevant international organisations including the Pan-African Telecommunications Union (PATU), International Telecommunications Union (ITU), Regional African Satellite Communication (RASCOM), International Telecommunication Satellite Organisation (INTELSAT), International Maritime Satellite Organisation (INMARSAT), Commonwealth Telecommmunications Organisation (CTO) and other related organisations; (b) improve and maintain inter-connectivity and modernize equipment to meet the common standards required for efficient telecommunications traffic within the Community; (c) harmonise and apply non-discriminatory tariffs among themselves and where possible, agree on preferential tariff treatment applicable within the Community; (d) co-operate and co-ordinate their activities in the maintenance of telecommunications facilities including training and the exchange of manpower; (e) encourage co-operation in local manufacturing of telecommunication equipment, research and development; (f) facilitate a conducive environment to promote private sector investors in the info-telecommunication equipment within the 73 info-