The tax imposed under this subchapter shall be in addition to any tax imposed by the Commonwealth under Article II of the act of March 4, 1971 (P.L.6, No.2), known as the Tax Reform Code of 1971. Except for the differing situs provisions in section 17153 (relating to situs), the provisions of Article II of the Tax Reform Code of 1971 shall apply to the tax.
16 Pa.C.S. § 17151