How is it managed    

1. To help achieve the objectives referred to in Articles 26 and 174 and to enable citizens of the Union, economic operators and regional and local communities to derive full benefit from the setting-up of an area without internal frontiers, the Union shall contribute to the establishment and development of trans-European networks in the areas of transport, telecommunications and energy infrastructures. Article 170 Treaty of Lissabon 

The legal framework deals mainly with two issues in the field of trans-European transport networks: the definition of the Network itself including, the Priority Projects, and the basis for granting community aid for the realisation of these projects.

Establishing the network

The definition of what is TEN-T, including the objectives and the scope of the network, is laid down in Decision No 1692/96/EC of the European Parliament and of the Council of July 1996 on Community guidelines for the development of the trans-European transport network. The guidelines include all the projects,the measures for realisation and the priorities and the modes of transport that are comprised by the TEN-T. Furthermore, it includes a list of 30 Priority Projects in Annex III.

The guidelines were revised and amended by Decision No 1346/2001/EC of the European Parliament and the Council of May 2001 and Decision No 884/2004/EC of the European Parliament and the Council of April 2004. Whereas the latter introduced new priorities and amended the list of Priority Projects, the 2001 Decision amended the guidelines in regard of seaports and intermodal transport. The accession of the new Member States entailed the extension of the network on their territories. Council Regulation (EC) No 1791/2006 of 20 November 2006 extended it further to the territories of Bulgaria and Romania.