Feed-in-Tariff scheme started from July 2012, replacing RPS and revising existing purchasing scheme for PV electricity. Electric power companies are obliged to purchase electricity generated from renewable energy sources on a fixed-period contract at a fixed price. Cost for purchasing is paid by electricity users in the form of a nationwide equal surcharge. And electric power companies pay a part of the cost (the equal amount to the generation cost that they could avoid to pay by purchasing renewable electricity from the producers). Purchase price is re-examined and published in each year. Detailed information on the purchase price is available in below section "Amendment".