Many of these intra-EU BITs were agreed in the 1990s, before the EU enlargements of 2004, 2007 and 2013.
Paljud neist ELi-sisestest kahepoolsetest investeerimislepingutest sõlmiti 1990ndatel enne ELi 2004., 2007. ja 2013. aasta laienemisi.