87. The Community may acquire by expropriation any immoveable, part of an immoveable or any real right, within or without the limits of its territory, which it may require for the attainment of its objects.
However, in the case of an immoveable, part of an immoveable or any real right set apart for a public use or not susceptible of expropriation according to some general law or special act, the prior authorization of the Government shall be required.