Pa. Const. art. IX, § 9

The General Assembly shall not authorize any municipality or incorporated district to become a stockholder in any company, association or corporation, or to obtain or appropriate money for, or to loan its credit to, any corporation, association, institution or individual. The General Assembly may provide standards by which municipalities or school districts may give financial assistance or lease property to public service, industrial or commercial enterprises if it shall find that such assistance or leasing is necessary to the health, safety or welfare of the Commonwealth or any municipality or school district. Existing authority of any municipality or incorporated district to obtain or appropriate money for, or to loan its credit to, any corporation, association, institution or individual, is preserved.