16 Pa. Stat. § 12741
The effectuation of its authorized purposes by the "Authority" is and will be in all respects for the benefit of the people of the Commonwealth of Pennsylvania for the increase of their commerce and prosperity and for the improvement of their health and living conditions, and since the "Authority" will be performing essential governmental functions in effectuating said purposes, the "Authority" shall not be required to pay any taxes or assessments upon any property acquired or used by it for such purposes, and the bonds or other securities or obligations issued by the "Authority," their transfer, and the income therefrom (including any profits made on the sale thereof), shall at all times be free from taxation within the Commonwealth of Pennsylvania.
16 P.S. § 12741