22.—(1) An authorised officer who has procured a sample under Article 29 of the Order and who considers it should be analysed shall divide the sample into three parts.
(2) If the sample consists of sealed containers and opening them would, in the opinion of the authorised officer, impede a proper analysis, the authorised officer shall divide the sample into parts by putting the containers into three lots, and each lot shall be treated as being a part.
(3) The authorised officer shall —
(a)if necessary place each part in a suitable container and seal it;
(b)mark each part or container;
(c)as soon as reasonably practicable, give one part to the owner and notify the owner in writing that the sample will be analysed;
(d)submit one part for analysis in accordance with Article 30 of the Order; and
(e)retain one part for future submission under regulation 23.