451. Expulsion of aliens.

As a matter of customary international law, a state may expel an alien1 from its territory2 at its discretion3. However, this discretion is not absolute: a state must not abuse its right by acting arbitrarily in taking a decision to expel an alien, and an international tribunal may require reasons to be given for the expulsion of an alien and may pronounce upon their adequacy4. The manner of expulsion may engage the international responsibility of the expelling state to that of the alien's nationality. In particular, the expulsion should be consistent with the domestic law of the expelling state