The content and the form of required labelling of food depends on the food and on the position of the business operator in the food chain. In principle, every entrepreneur is required to provide information on the country of production and the composition of the food (article 20 Swiss Federal Food Act). Pre-packaged food and foodstuffs offered for sale without pre-packaging must inform consumers of the name under which the product is sold, the ingredients, durability, origin and the application of genetic or special technological procedures in its production. They must as well as refer to the appropriate use (article 26 and 27 of the Swiss regulation on declaration and advertising of food). Labelling of the nutritive value is voluntary (article 29 of the Swiss regulation on declaration and advertising of food). The Swiss regulation on declaration and advertising of food regulates the data and in which form food generally has to be labelled, and in which form it may be advertised. For further information on European legislation on product labelling and packaging see http://europa.eu.