(a) for each lot or batch of cannabis any portion of which has been sold or exported, retain a document demonstrating that the cannabis and anything that was used as an ingredient was produced, packaged, labelled, distributed, stored, sampled and tested in accordance with the applicable provisions of Parts 5 and 6;

(d) in respect of the testing conducted under Part 5 or to meet the requirements set out in Part 6,

(ii) a document that describes every investigation conducted under paragraph 19(2)(b) or (c) and any measures taken under that paragraph; and

(b) each version of the document referred to in subparagraph (1)(d)(i), for at least two years after the day on which the validated methods are replaced or, if the methods have not been replaced, two years after the day on which the licence expires or is revoked.