62 Pa. Stat. § 1521.404
The Governor, Auditor General and the State Treasurer are hereby authorized to provide, by resolution, for the issuance of refunding bonds for the purpose of refunding any bonds issued under the provisions of this act and then outstanding, either by voluntary exchange with the holders of such outstanding bonds, or to provide funds to redeem and retire such outstanding bonds with accrued interest and any premium payable thereon, at maturity or at any call date. The issuance of such refunding bonds, the maturities and other details thereof, the rights of the holders thereof, and the duties of the Governor, Auditor General and the State Treasurer in respect to the same, shall be governed by the foregoing provisions of this act, in so far as the same may be applicable. Refunding bonds may be issued by the Governor, Auditor General and the State Treasurer to refund bonds originally issued or to refund bonds previously issued for refunding purposes.
62 P.S. § 1521.404