7 Pa. Code § 3.91
It shall be unlawful to bring a dog into this Commonwealth without a certificate of health prepared by a licensed graduate veterinarian, which certificate shall accompany the dog while in this Commonwealth. The certificate shall state that the dogs show no signs or symptoms of infectious or communicable disease; did not originate within an area under quarantine for rabies; and, as ascertained by reasonable investigation, have not been exposed to rabies within 100 days of importation. A dog over 3 months and under 1 year of age shall have been vaccinated against rabies with an approved rabies vaccine. A dog over 1 year of age shall have been vaccinated or revaccinated against rabies after 1 year of age. The vaccination to prevent rabies shall be valid for a period of 3 years for dogs vaccinated at more than 1 year of age with an approved 3-year MLV vaccine or inactivated vaccine and for a period of 1 year for other approved inactivated vaccines. The name of the vaccine manufacturer, the date of administration and the rabies tag number shall appear on health certificates prepared by a licensed graduate veterinarian.
7 Pa. Code § 3.91