(a) Service of original process upon the Commonwealth or an officer of the Commonwealth, or a department, board, commission or instrumentality of the Commonwealth, or a member thereof, shall be made at the office of the defendant and the office of the attorney general by handing a copy to the person in charge thereof.(b) Service of original process upon a political subdivision shall be made by handing a copy to
(1) an agent duly authorized by the political subdivision to receive service of process, or(2) the person in charge at the office of the defendant, or(3) the mayor, or the president, chairman, secretary or clerk of the tax levyinig body thereof, and in counties where there is no tax levying body, the chairman or clerk of the board of county commissioners.(c) This rule shall not apply to an appeal from an administrative determination, order or decree of such officer, department, board, commission or instrumentality.
