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1. Member countries shall ensure that their designated operators and authorized WPSPs referred to in article 5 are responsible for the execution of postal payment services vis-à-vis other operators and users.
2. They shall be accountable for risks such as operational risks, liquidity risks, and counterparty risks, in accordance with the national legislation.
3. In order to implement the postal payment services whose provision is entrusted to the designated operators and authorized WPSPs referred to in § 1, member countries shall ensure that such entities conclude bilateral or multilateral agreements with other designated operators and authorized WPSPs of their choice.
4. Without prejudice to the foregoing obligations, a designated operator shall have the possibility of sub-contracting, in part, the interconnection and operation of the postal payment services, defined herein as entrusted by its member country, to other entities contractually bound with that designated operator and in accordance with national legislation. In this regard, the designated operator shall guarantee the continued fulfilment of its obligations in accordance with the present Agreement and be fully responsible for all its relations with designated operators of other member countries and with the International Bureau.