CEVAP:

The treatment of aliens has been a controversial subject under international law. There are two principal approaches:

1- “international minimum standard” of treatment which must be accorded to aliens by all states, irrespective of how they treat their own nationals and

2- “national treatment”, that is, the treatment equal to that given by the concerned state to its own nationals should also be accorded to aliens.

The first approach is backed by developed nations; however, developing countries favor the second approach. Regardless of these approaches, international law does not control the treatment of aliens by states. However, if an alien is ill-treated contrary to the law of state responsibility, this will be treated as the injury to his national state.