The Transmission Code is a regulatory mechanism that defines the technical and organisational principles governing the Swiss transmission system. The provisions of the Transmission Code concern the relationship between Swissgrid and distribution system operators, electricity generators, end consumers and other electricity market players. The Transmission Code describes the tasks and functions of all parties concerned. It also governs the interfaces between Swissgrid and the market players. The Transmission Code defines the minimum requirements governing operation and use of the Swiss transmission system.