La. Stat. tit. 2 § 82
For the purposes set forth in R.S. 2:81 the department of public works by purchase, donation, lease, or condemnation may acquire property or an interest therein, including servitudes in airport hazards or land outside the boundaries of an airport, necessary to permit safe and efficient operation of the airports, to permit the removal, obstruction-marking, or obstruction-lighting of airport hazards, or to prevent the establishment of airport hazards. In like manner, the department may acquire existing airports and air navigation facilities. The department shall not acquire any airport or air navigation facility owned or controlled by a political subdivision of the state without consent first being obtained in writing from the governing authority of the political subdivision.
La. R.S. § 2:82