No contract or agreement shall be made for the labor or services of inmates of any correctional or other state institution in the manufacture of goods or any portion of such manufacture, or for the product of such labor or services, except after public notice, by advertising in at least three daily papers having a circulation in different sections of the state, calling for sealed proposals or bids for such labor, or the product thereof, and such proposal or bid, received in accordance with such notice, as is by its terms most advantageous to the state shall be accepted by the authorities in charge of the disposal of such labor, or the product thereof, and such contract or agreement shall be made in accordance with the terms of such notice and such proposal or bid. No such contract or agreement shall be made for any period exceeding four years. The provisions of this section shall not apply to § 18-88.