Article IX Section 5 Pennsylvania Constitution
Article IX Section 5 Constitution of the Commonwealth of Pennsylvania is about Intergovernmental Cooperation. Article IX is titled Local Government, it has 14 sections.
Intergovernmental Cooperation
A municipality by act of its governing body may, or upon being required by initiative and referendum in the area affected shall, cooperate or agree in the exercise of any function, power or responsibility with, or delegate or transfer any function, power or responsibility to, one or more other governmental unit including other municipalities or districts, the Federal government, any other state or its governmental units, or any newly created governmental unit.
See also: Article IX Section 4 Pennsylvania Constitution