(1) Where the owner or person in charge of any animal is charged with an offence against this Act, or against any regulations made thereunder, relative to disease or to any illness of the animal, he or she shall be presumed to have known of the existence of the disease or illness unless and until he or she shows to the satisfaction of the court that he or she had no knowledge thereof and could not with reasonable diligence have obtained that knowledge.
(2) Where a person is charged with an offence against this Act, or against any regulations made thereunder, in not having duly cleansed or disinfected any place, vessel, or thing, belonging to him or her or in his or her charge and a presumption against him or her on the part of the prosecution is raised it shall lie on him or her to prove the due cleansing and disinfection thereof.
(3) The certificate of a qualified Veterinary Surgeon to the effect that any animal is or was affected with a disease specified in the certificate shall for the purposes of this Act or of any regulations made thereunder be conclusive evidence in all courts of justice of the matter certified.