Other contacts and activities 3.4 International contacts a. E  uropean National Preventive Mechanism (NPM) Forum Commission representatives participated in the annual exchange meeting of the European NPM Forum, which was held in May and June of last year in Strasbourg. The main discussions focused on developing criteria for evaluating the methodology of the NPMs. To that end, a new initiative was launched in which individual NPMs are involved. In June, the Commission attended an advisory meeting of the European Council on the rules for administrative detention under immigration law, which are currently undergoing revision. b.  xchanges with National Preventive Mechanisms E (NPM) In October, a delegation from the Commission and the Secretariat met with their German and Austrian counterparts for an exchange of views in Berlin. The main focus of this year’s meetings were the monitoring of repatriations by air and other police monitoring activities including the monitoring of large-scale police operations. Such operations have not yet been the subject of an NCPT review. Activity Report NCPT 2017 29