La. Stat. tit. 33 § 3689.4
The police jury of any parish, after having given due notice of intention in the manner hereinbefore provided and after having disposed of all objections to the contemplated improvements, and having decided to order the construction of such improvements, it may, without further delay and subject only to the restrictions contained in the preceding Section, have prepared the necessary plans and specifications for said work and adopt a resolution authorizing the advertising for bids therefor by the giving of notice calling for sealed bids for the construction of said work, such notice to be signed by the president of the police jury, duly attested by the secretary thereof, and to be published for three consecutive weeks in a newspaper published in the parish, the first insertion to be not less than fifteen days prior to the reception and opening of the bids. Said notice shall contain a general description of the work contemplated, shall refer to the plans and specifications which shall be placed on file with the secretary of the police jury, and shall designate the hour, date and place for the reception and opening of the bids, and may provide that the contractor be required to accept paving certificates of the parish in payment for work performed and may further stipulate that right is reserved to reject any and all bids. Provided, that where a grant or contribution of materials and labor be made to the parish by the government of the United States of America, or the state of Louisiana, through any agency in aid of the cost of constructing the improvements authorized by R.S. 33:3689.1-33:3689.17, where the conditions on which such grant or contribution as made are that the work be done under the supervision and control of such agency or administration and the parish be required to contribute a proportionate amount of the cost of the work in materials, equipment and supplies, or should the police jury determine to construct the said improvements under its own supervision, and with its own labor, the police jury instead of being required to advertise for bids and award the contract for the construction of the work as prescribed in this Section, may advertise, in the manner hereinabove provided, for sealed bids for the purchase of the materials, equipment and supplies necessary to construct the said improvements, with the right to reject any and all bids, and thereafter without further advertisement, purchase such materials, equipment and supplies, upon the condition that the prices at which such purchases may be made shall not be greater than that specified in the lowest sealed bid received for such equipment, materials, supplies or any of them, and where no bids have been received the purchases thereof may be made without further advertisement at market prices; and the proportionate amount of the cost of the work together with engineer's and attorney's fees and all other expenses incidental to the cost of the improvements not contributed by any public agency, shall be assessed and paid in the manner and form hereinafter provided.
La. R.S. § 33:3689.4