32 Pa. Stat. § 5003
The Department of Conservation and Natural Resources and the Department of Agriculture shall not acquire any interest in real property under the provisions of this act, unless said real property has been designated for open space uses in a resource, recreation, or land use plan submitted to and approved by the State Planning Board. A local government unit shall not acquire any interest in real property under the provisions of this act unless said real property has been designated for open space uses in a resource, recreation or land use plan recommended by the planning commission of the municipality in which the real property is located and adopted by the governing body of that municipality. Where the municipality in which the real property to be acquired is located has no planning commission, a local government unit shall not acquire any interest in real property under the provisions of this act unless said real property has been designated for open space uses in a resource, recreation or land use plan approved by the planning commission of the county in which the real property is located and adopted by the governing body of the municipality wherein the real property is located.
32 P.S. § 5003