La. Stat. tit. 33 § 3689.5
The police jury shall meet in open session on the date and at the place and hour named in the notice calling for sealed bids for the construction of the said works, and proceed to open said bids and award the contract to the lowest bidder who can furnish satisfactory security, or it may reject any and all bids, and at any time within a period of thirty days from the date of the reception and opening of said bids award the contract for said works without further advertisement, provided, that no contract shall be so let for an amount greater than that specified in the lowest sealed bid received from a responsible bidder. Any contract awarded under the provisions of R.S. 33:3689.1-33:3689.17 shall be authorized by resolution of the police jury authorizing and empowering the president and the secretary thereof to execute said contract for, on behalf of, and in the name of the parish, and a copy of the said contract shall be set forth in full in said resolution and the resolution shall be published in full in one issue of the official journal of the parish, and a certified copy of said resolution shall be filed with the clerk of court of the parish and by him duly recorded in the mortgage records thereof. Provided, that the procedure set forth in this Section shall not apply in cases where any federal or state agency has made grants or contributions of material and labor in aid of the cost of constructing said improvements and the work is done under the supervision and control of such agency or agencies as provided in R.S. 33:3689.4, and also where the work is undertaken by the parish, the bid received for materials, equipment and supplies shall be opened and awarded or rejected as hereinabove provided.
La. R.S. § 33:3689.5