On behalf of the Norwegian government, the Norwegian Water Resources and Energy Directorate (NVE) determines how much electricity network operators can earn in a particular year. Since there is only one network operator in each geographic area, the NVE audits the companies’ accounts every year to make sure they are not exploiting their monopoly position. Network operators set the price that the individual customer must pay for electricity to be delivered to their homes, but the operators’ overall income must not exceed the cap that the NVE has determined for each company.