3. The use of wood is permitted in rooms in which meat products are smoked, cured, matured, pickled, stored or dispatched, when essential for technological reasons, provided there is no risk of the products being contaminated. Wooden pallets may be brought into those rooms but solely for transporting packaged meat or meat products and for no other purposes. In addition, the use of galvanised metals may be authorised for the drying of hams and sausages, provided that they are not corroded and do not come into contact with the meat products.