La. Stat. tit. 33 § 3356
Whenever the governing authority of any municipality resolves to make any improvement authorized by this Sub-part, it shall prepare plans and specifications of the work to be placed on file in the office of the clerk or engineer, and shall adopt an ordinance or resolution, ordering and describing in general terms the contemplated improvement and authorizing the clerk or secretary to advertise for bids therefor, which advertisement shall be inserted at least twice in some newspaper published in the municipality, or if there is no newspaper published therein, then in a newspaper having general circulation therein, the first insertion to be not less than ten days prior to the date fixed for the reception of the bids. The advertisement shall contain a general description of the contemplated work and shall designate the hour, date, and place for the reception and opening of the bids. The governing authority of the municipality shall then let the contract to the lowest responsible bidder who can furnish satisfactory security. The governing body may reject any and all bids, and instead of letting the contract to the lowest bidder, the municipality may purchase the material and have the work done, in which case the costs of the work when completed, shall be assessed and paid as herein provided.
La. R.S. § 33:3356