24.—(1) This paragraph applies where proceedings for an offence under these Regulations relate to a substance or article of which a sample has been taken as mentioned in paragraph 1 of this Schedule.
(2) Where this paragraph applies, the part of the sample retained in pursuance of paragraph 10(a) is to be produced as evidence.
(3) The court must, if requested by a party to the proceedings, and may, in the absence of such a request, cause that part of the sample to be sent for analysis to the Government Chemist (or, in Northern Ireland, to the Government Chemist in Northern Ireland) or to be sent for other examination to a laboratory specified by the court.
(4) If, in a case where an appeal is brought, no action has been taken under sub-paragraph (3), that sub-paragraph applies to the court by which the appeal is heard.
(5) A person or laboratory to whom or to which a part of a sample is sent under this paragraph for analysis or other examination must—
(a)analyse or examine it; and
(b)issue and give to the court a certificate specifying the results of the analysis or examination.
(6) A certificate under sub-paragraph (5)(b) is to be evidence (and, in Scotland, is to be sufficient evidence) of the facts stated in the certificate unless a party to the proceedings requires that the person by whom it was issued be called as a witness.
(7) In Scotland, if the person by whom a certificate is issued is called as a witness that person’s evidence is sufficient evidence of the facts stated in the certificate.
25. The costs of analysis or examination under paragraph 24 are to be paid by the prosecutor or the defendant (or, in Scotland, the accused) as the court may order.