Where proceedings are taken on summons under this Act for an offence concerning a substance or a plant that has been analysed or examined by, or under the supervision of, an analyst –

(a) a document purporting to be a certificate of the result of the analysis or examination is not admissible in evidence in those proceedings unless a copy of the document has been served on the defendant not less than 7 days before the hearing of those proceedings; and

(b) section 177A of the Evidence Act 2001 does not apply in relation to those proceedings.