The local authority may from time to time, for the purpose of utilizing sewage, agree with any person as to the supply of such sewage or the distribution or disposal or treatment thereof over land, and as to the works to be made for the purpose of such supply or distribution or disposal, or treatment, and as to the parties to execute the same and to bear the costs thereof, and as to the sums of money, if any, to be paid for that supply; provided that no contract shall be made for the supply of sewage for a period exceeding five years, unless with the authority of the Board, and not for any period exceeding twenty-five years ; and the local authority may, in terms of the provisions of sections one hundred and forty-four and one hundred and forty-five of this Act, contract for, purchase, or take on lease any lands, buildings, engines, materials, or apparatus for the purpose of receiving, storing, disinfecting, distributing, or disposing of or treating sewage.