Any acquisition of property made prior to April 21, 1958, within or without the limits of any municipality, for the purposes authorized by the Municipal Airport Law, and any other action taken prior to said date by a municipality in furtherance of such purposes, including, but not limited to the making of appropriations, the expenditure of money, the incurring of debts, the acceptance and disbursement of federal, state or other grants or loans, the issuance and payment of bonds and notes, the execution of leases and contracts, which acquisition or action would have been authorized had said law been in effect at the time of such acquisition or action, is hereby ratified and made valid. All bonds and notes issued prior to said date in furtherance of purposes authorized by said law and actions ratified by this section are confirmed as legal obligations of the municipality, and, without prejudice to the general powers granted to the municipality by said law, such municipality is hereby authorized to issue further bonds and notes for such purposes up to the limit fixed in the original authorization therefor, which bonds and notes shall be legal obligations in accordance with their terms.