h regulatory intervention should be targeted toward imposing minimum QoS requirements to ISPs for their IAS offers. That can be completed in a regulatory process [4], which starts with the NRA identifying degradations. That is followed by evaluation of QoS indicators for the purposes of verification of IAS degradation (or degradation of individual OTT service) and analysis of the measurement results to decide whether the intervention is needed. If the QoS assessment results in necessary regulatory intervention, then the NRA chooses a regulatory tool for that purpose. The NRA makes a decision about the requirements imposed on the ISP and notifies the ISP about them. Finally, the NRA makes a final decision for the set of minimum QoS requirements on the ISP, which is followed by monitoring of QoS indicators for compliance purposes. 8.3 Main Regulatory Goals on Network Neutrality Availability of offers with sufficient quality at a reasonable price availability No need for intervention by NRA Need for intervention availability by NRA Easiness of ISP switching ISP switching is ISP switching is ISP - Internet service provider NRA - National regulatory agency Figure 8.3 Regulatory interventions in regard to network neutrality. Overall, there is no mandatory explicit regulation of network neutrality in all coun- tries. Some countries may decide that no specific action is required regarding network neutrality. Some might argue that the regulatory approaches already taken go beyond what is reasonable. Overall, there is no clear global consensus on how to deal with net- work neutrality, SO NRAs make make their own reasonable judgments on the basis of their national legislation and telecom/ICT market development. One specific approach regarding network neutrality is zero rating, which refers to the ISP denoting a price of zero to the Internet traffic associated with a particular applica- tion or group of applications (in such a case the data does not count toward any data cap applied to the IAS for a given customer). This may