http://www.legislation.gov.uk/eur/2006/1850/article/11Commission Regulation (EC) No 1850/2006 of 14 December 2006 laying down detailed rules for the certification of hops and hop productsCommission Regulation (EC) No 1850/2006Commission Regulation (EC) No 1850/2006 of 14 December 2006 laying down detailed rules for the certification of hops and hop productsKing's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02006R1850-20130701texttext/xmlen2025-02-05Expert Participation2020-12-31 CHAPTER 3HOP PRODUCTSOfficial surveillance during production of hop products Article 11 1 In the case of production of hop products, representatives of the competent certification authority shall be present at all times when processing is taking place. They shall supervise the processing adequately at every stage, from the opening of the sealed package containing the hops or hop product to be processed to the completion of packing, sealing and marking of the hop product. The absence of representatives of the competent certification authority is permissible as long as it can be assured by technical means, approved by the competent certification authority, that the provisions of this Regulation are respected. 2 Before changing to a different batch in a processing system the representatives of the competent certification authority shall ensure by official surveillance 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 surveillance. They may be re-connected to the processing system under official surveillance only. A physical link between the processing line for concentrated hop powder and that for non-concentrated hop powder shall not be allowed while either is operating.