KEY TAKEAWAYS

The Netherlands has lifted its opposition to Bulgaria's accession to the Schengen Zone, citing the country's fulfilment of necessary requirements.
Austria, however, continues to block Bulgaria's and Romania's membership, proposing additional conditions and only-by-air accession.
Bulgaria and Romania have long sought entry into the Schengen Area but face challenges related to irregular migration concerns.

Bulgaria’s accession to the Schengen Zone will no longer be blocked by the Netherlands after the latter’s justice ministry has agreed to Sofia’s membership in the passport-free area.