4 30 3.3 Authorized operating agencies shall determine by mutual agreement which international routes are to be used. Pending agreement and provided that there is no direct route existing between the terminal authorized operating agencies concerned, the origin authorized operating agency has the choice to determine the routing of its outgoing telecommunication traffic, taking into account the interests of the relevant transit and destination authorized operating agencies. 31 3.4 Subject to national law, any user, by having access to the international network, has the right to send traffic. A satisfactory quality of service should be maintained to the greatest extent practicable, corresponding to the relevant ITU-T Recommendations. 31A 3.5 Member States shall endeavour to ensure that international telecommunication numbering resources specified in ITU-T Recommendations are used only by the assignees and only for the purposes for which they were assigned; and that unassigned resources are not used. 31B 3.6 Member States shall endeavour to ensure that international calling line identification (CLI) information is provided taking into account the relevant ITU-T Recommendations. 31E 3.7 Member States should create an enabling environment for the implementation of regional telecommunication traffic exchange points, with a view to improving quality, increasing the connectivity and resilience of networks, fostering competition and reducing the costs of international telecommunication interconnections. ARTICLE 4 International telecommunication services 32 4.1 Member States shall promote the development of international telecommunication services and shall foster their availability to the public. 33 4.2 Member States shall endeavour to ensure that authorized operating agencies cooperate within the framework of these Regulations to provide, by agreement, a wide range of international telecommunication services which should conform, to the greatest extent practicable, to the relevant ITU-T Recommendations. 34 4.3 Subject to national law, Member States shall endeavour to ensure that authorized operating agencies provide and maintain, to the greatest extent practicable, a satisfactory quality of service corresponding to the relevant ITU-T Recommendations with respect to: 35 a) access to the international network by users using terminals which are permitted to be connected to the network and which do not cause harm to technical facilities and personnel; 36 b) international telecommunication facilities and services available to users for their dedicated use;