Any contracts heretofore entered into for construction and repair of roadways, runways, buildings and facilities or the purchase thereof within or for use within the limits of land acquired for the establishment and operation of airdromes or landing fields, without first having obtained the approval of the court of quarter sessions of the county and entered into as provided for the general business of the county or other political subdivisions jointly interested, are hereby ratified, confirmed, approved and declared lawful contracts.
16 P.S. § 5408