"The Commission decided today to launch infringement procedure by sending letters of formal notice to Austria, Bulgaria, Hungary and Romania for signing an agreement with 5 Western Balkan countries on the automated exchange of DNA data, dactyloscopic data and vehicle registration on 13 September 2018."
See: Commission calls on 4 Member States to respect EU exclusive competence in the area of automated DNA, fingerprint and vehicle registration data exchange (Prüm Decisions) (Commission press release, link):
“The Commission considers the agreement is in breach of EU exclusive competence in the area, especially since the exchange of such data between Member States is covered by the Prüm Council Decisions (Council Decisions 2008/615/JHA and 2008/616/JHA). The Member States concerned have two months to reply to the arguments raised by the Commission. Otherwise, the Commission may decide to send a reasoned opinion.”