(1) “Contracting body” means any officer, employe, authority, board, bureau, commission, department, agency or institution of the Commonwealth of Pennsylvania, or any State-aided institution, or any county, city, district, municipal corporation, municipality, municipal authority, political subdivision, school district, educational institution, borough, incorporated town, township, poor district, county institution district, other incorporated district or other public instrumentality, which has authority to contract for the construction, reconstruction, demolition, alteration or repair of any public building, or other public work or public improvement or for the provision of services to or lease of real or personal property whether by lease or concession from such contracting body, excepting highway work.

(2) “State-aided institutions” shall mean and include any institution which receives State funds directly or indirectly for the construction, reconstruction, demolition, alteration or repair of its buildings, works or improvements, excepting highway work.