Business operators who manufacture, process, treat, transport, deliver, import or export food must notify the responsible cantonal executive authority of their activity. Important modifications within businesses and cessation of business must also be notified (article 12 of the Swiss regulation on food and commodities). Enterprises that manufacture, process, treat, store, or deliver food of animal origin require an authorisation by the responsible cantonal enforcement authority (article 13 of the Swiss regulation on food and commodities). The Federal Office of Public Health has specified those enterprises that fall under the special arrangement of the grant obligation in its instruction No 7 of 26 January 2006 for the implementation of the two articles 12 and 13 of the Swiss regulation on food and commodities. It has also published, together with the federation of cantonal chemists, an information letter for enterprises on the obligation of notification and authorisation.