Article 67 is a short technical provision, but it supports the entire machinery of cross-border GDPR enforcement. Articles 56 and 60 to 66 require supervisory authorities and the European Data Protection Board to exchange large volumes of information under strict deadlines. Article 67 allows the European Commission to establish uniform technical and procedural arrangements so those exchanges can take place securely, consistently and efficiently.
In the simplest terms:
The earlier Articles explain what supervisory authorities must communicate. Article 67 allows the Commission to standardise how they communicate it electronically.