19. Any person who, without lawful authority or excuse, proof of which shall lie on him—
(a)defaces, obliterates or removes any mark applied to a horse in pursuance of article 18; or
(b)contravenes any provision of this Order; or
(c)fails to comply with any such provision or with any conditions of an approval given under article 17(3); or
(d)knowingly causes or permits any such contravention or non-compliance,
commits an offence against the Act.