Before changing to a different batch in a processing system the representatives referred to in Articles 8 (6) shall ensure by inspection that the processing system is empty, at least to the extent necessary to ensure the elements of two different batches cannot be mixed. If hops, hop products, spent hops or any other product derived from hops remain in parts of the processing system such as blending or canning containers while hops of another batch is being processed, these parts have to be disconnected from the processing system by suitable technical means and under official supervision.
