The 2003 Electricity Market Act modified the incentive scheme surrounding renewable energy production. It maintained an obligation to purchase electricity generated from renewable energy sources, at a fixed tariff of EEK 0.81/kWh. Network operators were obliged to purchase the electricity generated by a renewable energy producer to the extent of the operators network losses. The Act sets out that such a scheme will not run past 2015. The Act also establishes a certificate of origin system for renewable energy, as well as various other enabling measures. For example, it ensures that network services are to be provided under the same conditions, and non-discriminatory network charges for transmission and distribution. It also obliges that customers be informed regarding the energy sources used to generate electricity and their environmental impact.