The Animal Warden or his duly authorized representative shall, immediately upon impounding any dog, make a complete registry entering the breed, color, and sex of such dog, and whether licensed, if known. If licensed, he shall enter the name and address of the owner and the number of the license tag, if known, and, if bearing an inoculation tag, the number of such tag shall be recorded. When any licensed animal shall be impounded, the Animal Warden or his duly authorized representative shall give immediate notice, either personal or by certified mail, to the owner of said licensed dog, informing such owner of the impounding of his dog and the reason therefor.
('86 Code, § 3.109)