at a time when a horse is in such a condition that its riding would be likely to cause suffering to the horse, lets out the horse on hire or uses it for the purpose of providing, in return for payment, instruction in riding or for the purpose of demonstrating riding;

lets out on hire for riding or uses for the purpose of providing, in return for payment, instruction in riding or for the purpose of demonstrating riding any horse aged three years or under or any mare heavy with foal or any mare within three months after foaling;

supplies for a horse which is let out on hire by him for riding equipment which is used in the course of the hiring and suffers, at the time when it is supplied, from a defect of such a nature as to be apparent on inspection and as to be likely to cause suffering to the horse or an accident to the rider;

fails to provide such curative care as may be suitable, if any, for a sick or injured horse which is kept by him with a view to its being let out on hire or used for a purpose mentioned in paragraph (a) of this subsection;

in keeping a riding establishment knowingly permits any person, who is for the time being disqualified under this Act from keeping a riding establishment, to have control or management of the keeping of the establishment; or

with intent to avoid inspection under section 2 of this Act, conceals, or causes to be concealed, any horse maintained by the riding establishment;