The term “official vaccinate” means a female bovine animal which was inoculated against brucellosis in Illinois with a licensed vaccine. Such vaccinations shall be by an accredited veterinarian who shall properly identify each animal vaccinated and report all such vaccinations to the Department within 30 days. An “official vaccinate” also means an animal inoculated in a similar manner under existing laws in states other than Illinois. The official vaccination age for Illinois shall be set by regulation.