Under the EU net neutrality rules, national regulatory authorities are required to submit to the European Commission and BEREC annual reports on their monitoring and findings regarding compliance with the open internet rules in Articles 3 and 4 of Regulation (EU) 2015/2021 and to publish these reports. The European Commission has published the reports submitted by the national regulatory authorities here.
The national regulatory authority in Germany, the Federal Network Agency ("BNetzA") has recently published its first annual report recently. It covers the period of May 2016 to April 2017 and describes BNetzA's supervision and enforcement activities regarding the requirements of Regulation (EU) 2015/2120 on open internet access. In particular, BNetzA was concerned with reviewing large ISPs' T&Cs (finding breaches of net neutrality rules consisting in prohibitions to use VoIP, messenger services and peer-to-peer services) as well as assessing the providers' traffic management measures (e.g. cases of port blocking) and certain "zero-rating" offers.