The certification requirement referred to in Article 4 shall not apply to:
((a))
hops harvested on land owned by a brewery or grown on contract for a brewery and used by that brewery in the natural or processed state;
((b))
hop products processed under contract on behalf of a brewery, provided that those products are used by the brewery;
((c))
hops and hop products for sale to private individuals for their own use put in small packets of not more than 5 kg in the case of cones, powders and pellets and 1 kg in the case of extracts or isomerised hop products, with a description of the product and its weight on the package.