9.—(1) The owner or any other person in charge of a dog shall not permit the dog to be in any place other than—

(a) the premises of the owner, or

(b) the premises of such other person in charge of the dog, or

(c) the premises of any other person, with the consent of that person,

unless such owner or such other person in charge of the dog accompanies it and keeps it under effectual control.

(2) If a dog worries livestock, the owner or any other person in charge of the dog shall be guilty of an offence unless it is established that at the material time the dog worried the livestock for the purpose of removing trespassing livestock and that having regard to all the circumstances the action was reasonable and necessary.

(3) F10[…]