(4)Article 35a (1) of Directive 2015/2366 sets out specific conditions applicable to NB-PSPs that wish to participate in payment systems designated under Directive 98/26/EC. Member States must define the procedure by which compliance of NB-PSPs with such conditions is assessed. Without prejudice to these procedures, it is important to lay down a common set of minimum requirements at a Eurosystem level that would need to be met by NB-PSPs that wish to obtain access to central bank operated payment systems. These minimum requirements should be reflected accordingly in the terms and conditions of agreements between the Eurosystem central banks and the NB-PSPs, and should include compliance with certain security requirements and the submission to the relevant Eurosystem central bank of, among others, statements by the NB-PSP or the relevant national authority confirming its initial, and thereafter, continuing, compliance with the conditions as set out in national law implementing Article 35a(1) of Directive 2015/2366 and the provision of additional supporting documentation where requested by the Eurosystem central banks.