La. Stat. tit. 33 § 3533
Municipalities which take advantage of the provisions of this Sub-part may through their governing authorities engage the services of an engineer and provide for his payment. This engineer shall prepare all plans and specifications for the work, and the governing authority shall approve them by a resolution. The engineer shall inspect the work as let in accordance with contracts hereunder and shall issue to the contractor, his estimates thereon from time to time as the work progresses, which estimates may be paid by the municipality either in full or by the retention of twenty (20%) per cent thereof as retained percentage; provided that where the work is undertaken by the municipality the engineer so employed shall inspect the work as it progresses and shall be responsible for the performance and completion thereof in accordance with the plans and specifications. Upon final completion of the work, the engineer shall render a report to the governing authority of the municipality as to the completion of the work in a satisfactory manner, which report shall be duly certified, and in addition, the engineer shall perform all engineering duties required of him in this Sub-part. The governing authority of the municipality may employ an attorney to handle all legal work in connection with the improvements and provide for the payment of his fee. The attorney, in addition to his other duties, shall prepare a complete transcript of the record of the proceedings covering each project complete hereunder and shall file the same with the clerk or secretary of the municipality. This filed transcript shall constitute a permanent record of the municipality.
La. R.S. § 33:3533