Council Directive 1999/20/EC of 22 March 1999 amending Directives 70/524/EEC concerning additives in feedingstuffs, 82/471/EEC concerning certain products used in animal nutrition, 95/53/EC fixing the principles governing the organisation of official inspections in the field of animal nutrition and 95/69/EC laying down the conditions and arrangements for approving and registering certain establishments and intermediaries operating in the animal feed sector