32 Pa. Stat. § 819.2
In pursuance of Article IV of the above Compact, there shall be five members of the Wheeling Creek Watershed Protection and Flood Control Commission from the Commonwealth of Pennsylvania, one of whom shall be a member of the Board of Commissioners of Greene County, Pennsylvania, appointed by that body to serve at its will and pleasure; one of whom shall be a citizen of Greene County, Pennsylvania, appointed by the Board of Commissioners of Greene County, Pennsylvania, to serve at its will and pleasure; one of whom shall be a member of the Board of Commissioners of Washington County, Pennsylvania, appointed by that body to serve at its will and pleasure; one of whom shall be a citizen of Washington County, Pennsylvania, appointed by the Board of Commissioners of Washington County, Pennsylvania, to serve at its will and pleasure; and one of whom shall be a member of the Water and Power Resources Board, Department of Forests and Waters, Commonwealth of Pennsylvania, appointed by the Governor of Pennsylvania to serve at his will and pleasure: Provided, That,
Vacancies shall be filled by the appointing authority responsible for making the appointment to the position vacated.
32 P.S. § 819.2