La. R.S. 33:140.13

After the commission has recommended and the city council has adopted a master plan in whole or in part, no plat of a subdivision of land lying within the area covered by the plan shall be filed or recorded until it shall have been submitted to and approved by the commission, and such approval entered in writing on the plat by the secretary of the commission. The clerk of court of Caddo Parish shall not file or record a plat of a subdivision without the approval of the commission as required by this Subpart; the filing or recording of a plat of a subdivision without the approval of the commission as required by this Section shall be void.