ECOWAS REVISED TREATY b) develop an extensive network of all-weather highways within the Community, priority being given to the inter-State highways; c) formulate plans for the improvementand integration of railway and road networks in the region; d) formulate programmes for the improvement of coastal shipping services and inter-state inland waterways and the harmonisation of policies on maritime transport and services; e) co-ordinate their positions in international negotiations in the area of maritime transport; f) encourageco-operationin flight-scheduling, leasingof aircraftand granting and joint use of fifth freedom rights to airlines of the region; g) promote the development of regional air transportation services and endeavour to bring about the merger of national airlines in order to promote their efficiency and profitability; h) facilitate the development of human resources through the harmonisation and coordination of their national training programmes and policies in the area of transportation in general and air transport in particular; i) endeavourto standardiseequipmentusedin transportand communications and establish common facilities for production, maintenance and repair. Member States also undertake to encourage the establishment and promotion of joint ventures and Community enterprises and the participation of the private sector in the areas of transport and communications. ARTICLE 33 POSTS AND TELECOMMUNICATIONS In the area of postal services, Member States undertake to: a) foster closer co-operation between their postal administrations; b) ensure, within the Community, efficient, speedier and more frequent postal services; c) harmonise mail routing; In the area of telecommunications, Member States shall: a) develop, modernise, co-ordinate and standardise their national 23