5.—(1) The purchase, or sale, by or on behalf of the licence holder of any of the following is prohibited—
(a)unweaned mammals;
(b)mammals weaned at an age at which they should not have been weaned;
(c)non-mammals that are incapable of feeding themselves;
(d)puppies, cats, ferrets or rabbits, aged under 8 weeks.
(2) The sale of a dog must be completed in the presence of the purchaser on the premises.