7 Pa. Code § 21.51
The provisions of this § 21.51 amended under sections 101 and 201 of the Dog Law (3 P. S. § § 459-101 and 459-201); and Articles II-IX-A of the Dog Law (3 P. S. § § 459-201-459-219, 459-301-459-305, 459-401, 459-402, 459-501, 459-502, 459-501-A-459-507-A, 459-601-459-603, 459-701-459-706, 459-801, 459-802, 459-901-459-907 and 459-901-A-459-911-A).