tefirst regulation i referred to establishes a list countries whose nationals be in possession of when crossing external borders this is the so called list
The first Regulation I referred to establishes a list of third countries whose nationals must be in possession of visas when crossing external borders; this is the so-called 'negative' list.
The first Regulation I referred to establishes a list countries whose nationals be in possession of when crossing external borders; this is the so-called list.