Restraining bovine animals
27. Without prejudice to the generality of paragraph 26, no person may stun an adult bovine animal in a knacker’s yard unless at the time it is stunned—
(a)it is confined in a stunning pen which is in good working order; or
(b)its head is securely fastened in such a position so as to enable it to be stunned without infliction of avoidable pain, distress or suffering.