++++ Freedom to provide services - Lawyers - Directive 77/249 - Implementation - Persons covered - Exclusion of nationals practising as lawyers in another Member State - Not permissible - Obligation to work in conjunction with a local lawyer - Scope - Procedures - Rule applicable to local lawyers concerning the territorial exclusivity of the right to plead - Not applicable to a lawyer providing services (EEC Treaty, Arts 59 and 60; Council Directive 77/249)