53 Pa. C.S. § 5623
"Certificate of revival." A certification issued by the Secretary of the Commonwealth that, as a result of required municipal statements of revival having been filed in proper form, the expired authority which is the subject of the municipal statements of revival is certified as having been retroactively revived for the term specified.
"Expired authority." An authority whose term of existence has expired in accordance with this chapter.
"Municipal statement of revival." A written statement prepared in accordance with subsection (b) and filed with the Secretary of the Commonwealth by the municipal authorities of each municipality that incorporated or subsequently joined in and had not withdrawn from an expired authority indicating that approval has been given for the retroactive revival of the expired authority by municipal authorities by resolution.
"Retroactively revived authority." An expired authority whose existence has been revived retroactively so that the authority is restored to its previous legal position in the same manner and to the same extent as if its term of existence had never expired. Retroactive revival shall have the effect of validating the business and affairs of the authority during its term of expiration, including all contracts and other transactions made and effected within the scope of the articles of the authority by its representatives and any rights, privileges, liabilities and obligations that the authority would have had if its term of existence had not expired.
"Term of expiration." The period of time that commences when an authority becomes an expired authority and that ends when the expired authority is retroactively revived in accordance with this section.
53 Pa.C.S. § 5623