(a) Upon receiving a report of a dangerous dog or potentially dangerous dog within a dog control officer's jurisdiction from a law enforcement agency, animal control agency, rabies control officer, or county board of health, the dog control officer shall make such investigations and inquiries with regard to such report as may be necessary to carry out the provisions of this article. Any local government shall be authorized but not required to provide by ordinance or resolution for additional duties of a dog control officer in identifying dangerous dogs or potentially dangerous dogs and their owners to carry out the provisions of this article.

(b) When a dog control officer classifies a dog as a dangerous dog or reclassifies a potentially dangerous dog as a dangerous dog, the dog control officer shall notify the dog's owner in writing by certified mail or statutory overnight delivery to the owner's last known address of such classification or reclassification. Such notice shall be complete upon its mailing.