Post-Brexit negotiations are just one of many debates regarding international immigration agreements.
Theresa May made it clear that EU citizens right to free movements will be granted until Brexit day in March 2019. A European. During the transition period, every European Union citizen can still settle in Great Britain. Brussel insists to extend the transition period at least until the end of 2020.
It's and hard challenge for Bulgaria during its first month of EU council presidency, Bulgaria, in fact, has seen its process to enter the Schengen zone has been delayed (together with Romania).
The country still needs reforms in order to achieve its target to become part of the European monetary system and be part of the Schengen Area.
Even if not part of Schengen Area, the two countries in the Balkans are already in the list of European Countries that will adopt ETIAS authorization to regulate visitors traffic.
The ETIAS authorization will probably also on the agenda of Brexit negotiations starting from next March 29. ETIAS could also be required to British citizens starting from 2020.
ETIAS is only one of the initiatives created by the European Union to regulate incoming traffic in the Schengen Area Countries.
Another initiative, the Entry-Exit system has been officially approved last November. The main reason of this system is to simplify and streamline immigration systems on the external borders of the Schengen Area for every individual entering the EU, while ETIAS will be used to screen visa waiver countries citizens providing them an authorization to visit Europe.