63.—(1) The following provisions shall have effect in relation to a prosecution for an offence under this Part of this Act:—

(a) any food shall be deemed, unless the contrary is proved, to have been sold or bartered or to be intended for sale or barter (as may be appropriate) for human consumption,

(b) any material or article which is found on premises used for or in the preparation or manufacture of food to be sold for human consumption and which is capable of being intended for use in such preparation or manufacture shall be deemed, unless the contrary is proved, to be so intended,

(c) where—

(i) a person has caused an analysis of any food to be made under the Sale of Food and Drugs Act, 1875, and

(ii) the analyst, having analysed such food, has given his certificate of the result of the analysis, and

(iii) it appears from the certificate that a regulation under this Part of this Act has been contravened,

such person may prosecute for the contravention and, the provisions of the Sale of Food and Drugs Acts, 1875 to 1936, relating to prosecutions shall apply as if such prosecution were a prosecution under the said Acts,

(d) if the defendant in any prosecution for an offence relating to the nature, substance, quality or condition of any food proves—

(i) that he purchased such food as of a nature, substance or quality or in a condition which would not have contravened such regulation and with a written warranty to that effect, and

(ii) that he had no reason to believe at the time when he sold such food that it was of a different nature or quality or in a different condition, and

(iii) that he sold such food in the same state as when he purchased it,

such defendant shall be discharged from the prosecution, but shall be liable to pay the costs incurred by the prosecutor unless he gave due notice to the prosecutor that he proposed to rely on the said defence.

(2) A statement by the manufacturer, importer, or seller of food as to its nature, substance, quality or condition in an invoice, or on a label attached to the food, or on the packet or container in which the food is sold shall be deemed for the purposes of subparagraph (i) of paragraph (d) of subsection (1) of this section to be a warranty.

(3) Where it appears to the authority or officer enforcing any provision of this Part of this Act or the regulations made thereunder that an offence has been committed in respect of which proceedings might be taken against some person but that such person could establish a defence under paragraph (d) of subsection (1) of this section by proving that the offence complained of was due to an act or default of some other person, such authority or officer may take proceedings against that other person without taking proceedings against the first-mentioned person.