492. Beyond these basic requirements—necessary to provide for the daily subsistence and survival of a number of people for an indefinite time—the Tribunal considers that the text of Article 121(3) does not directly indicate the threshold that would separate settled human habitation from the mere presence of humans. Nor does the text of Article 121(3) elucidate the physical characteristics of a feature that would be necessary to sustain the more settled mode of human habitation, rather than merely ensuring human survival.