AETR
Abbreviation for a European agreement on transport. It includes social rules for the protection of drivers.
The EU has negotiated agreements on behalf of the member states since the AETR case 22/70. In this "revolutionary" case, the EC Court in Luxembourg established the principle that the EU automatically has external negotiating competence where it is competent to establish internal rules. Put simply, internal competence = external competence.
Under the Treaty of Nice this principle has developed so that decisions concerning international agreements are normally taken according to the voting procedures which apply in the area of similar internal decisions - i.e. unanimity or qualified majority.
The Lisbon Treaty gives the EU a single legal personality allowing it to negotiate internationally on behalf of the member states in all areas where the EU can act internally. This power ('competence') of external negotiation is a so-called "exclusive competence", where the member states are not allowed to act unless they are authorised to do so by the EU authorities.
See the very important new Art. 47 TEU in the Lisbon Treaty.
Links
European Agreement concerning the Work of Crews of Vehicles engaged in International Road Transport (AETR)