The Member States shall require that analyses for official controls of feedingstuffs as regards their levels of starch, crude protein, crude protein which can be dissolved by pepsin and hydrochloric acid, of free and total gossypol and as regards pepsin activity be carried out using the methods described in Annex I to this Directive. The Member States shall also require that analyses for official controls of feedingstuffs, for the purpose of detecting and identifying antibiotics of the tetracycl