The respective authorities of the several counties, cities, boroughs, incorporated town and townships of this Commonwealth are hereby authorized to appropriate from time to time as required such amounts as may be deemed advisable or necessary to aid in the establishment or continuance therein of Federal Surplus Commodities Stamp plans for the removal of surplus agricultural commodities set up by the Federal Government under the authority of Acts of Congress and rules and regulations duly adopted in accordance therewith. For said purpose the county, city, borough, incorporated town or township is hereby authorized to borrow money and incur indebtedness subject to constitutional limitations and may issue as evidence thereof registered or coupon serial bonds payable by such municipality within ten years from their issue and bearing interest at a rate not exceeding six per cent per annum payable annually or semiannually and may negotiate the same for the purpose of raising the money necessary to carry out the provisions of this act, and said political subdivisions may levy and collect taxes on all taxable property in said subdivisions for the purpose of paying any bonded indebtedness which may be incurred as herein provided.