7 42G 6.2.2 Unless otherwise agreed, parties engaged in the provision of international telecommunication services shall follow the relevant provisions as set out in Appendices 1 and 2. 42H 6.2.3 In the absence of special arrangements concluded between authorized operating agencies, the monetary unit to be used in the composition of accounting rates for international telecommunication services and in the establishment of international accounts shall be: – either the monetary unit of the International Monetary Fund (IMF), currently the Special Drawing Right (SDR), as defined by that organization; – or freely convertible currencies or other monetary unit agreed between the authorized operating agencies. 42HA Collection charges 42I 6.2.4 The charges levied on customers for a particular communication should in principle be the same in a given relation, regardless of the international route used for that communication. In establishing these charges, Member States should try to avoid dissymmetry between the charges applicable in each direction of the same relation. 42J Taxation 42K 6.3 Where, in accordance with the national law of a country, a fiscal tax is levied on collection charges for international telecommunication services, this tax shall normally be collected only in respect of international services billed to customers in that country, unless other arrangements are made to meet special circumstances. 42KA 6.4 Service telecommunications 42KB 6.4.1 Authorized operating agencies may in principle forgo the inclusion of service telecommunications in international accounting, under the relevant provisions of the Constitution and the Convention and these Regulations, having due regard for the need for reciprocal arrangements. Authorized operating agencies may provide service telecommunications free of charge. 42KC 6.4.2 The general operational, charging and accounting principles applicable to service telecommunications should take account of the relevant ITU-T Recommendations. ARTICLE 7 Suspension of services 55 7.1 If a Member State exercises its right in accordance with the Constitution and the Convention to suspend international telecommunication services partially or totally, that Member State shall immediately notify the Secretary-General of the suspension and of the subsequent return to normal conditions by the most appropriate means of communication.