La. R.S. 2:137

Cities, towns, and other political subdivisions of this state may acquire the right or privilege for a term of years, or perpetually, to place and maintain suitable marks for the daytime, and to place, operate, and maintain suitable lights for the nighttime marking of buildings, or other structures or obstruction, for the safe operation of aircraft utilizing airports and landing fields acquired or maintained under the provisions of this Part. Such rights or privileges may be acquired by grant, purchase, lease, or expropriation in the same manner as is provided in R.S. 2:133 for the acquisition of the airport or landing field itself or the expansion thereof.