(b) where the taxable transaction is ef
fected by a taxable person who is not established within the territory of the country and no legal instrument exists, with t
he country in which that taxable person is established or has his seat, relating to mutual assistance similar in
scope to that laid down by Directives 76/308/EEC(8) and 77/799/EEC(9) and by Council Regulation (EEC) No 218/92 of 27 January 199
2 on admin ...[+++]istrative cooperation in the field of indirect taxation (VAT)(10), Member States may take steps to provide that the person liable for payment of the tax shall be a tax representative appointed by the non-established taxable person.