Every authority created pursuant to this article shall have a term of existence of fifty years from the date of the resolution activating it. The board of county commissioners of any county of the second class with an existing residential finance authority having a term of existence of fewer than fifty years may, by proper resolution which finds and declares that there is a need for the continued existence of the county's residential finance authority beyond the period of existence originally provided for, extend the authority's term of existence to a date not exceeding fifty years from the date of the resolution.
16 P.S. § 5209-A