§ 323. Just as a State is competent to refuse admittance to an alien, so it is, in conformity with its territorial supremacy, competent to expel at any moment an alien who has been admitted into its territory. And it matters not whether the respective individual is only on a temporary visit or has settled down for professional or business purposes on that territory, having taken his domicile thereon. Such States, of course, as have a high appreciation of individual liberty and abhor arbitrary powers of Government will not readily expel aliens. Thus, the British Government has no power to expel even the most dangerous alien without the recommendation of a Court, or without an Act of Parliament making provision for such expulsion. And in Switzerland, article 70 of the Constitution empowers the Government to expel such aliens only as endanger the internal and external safety of the land. But many States are in no way prevented by their Municipal Law from expelling aliens according to discretion, and examples of arbitrary expulsion of aliens, who had made themselves objectionable to the respective Governments, are numerous in the past and the present.
On the other hand, it cannot be denied that, especially in the case of expulsion of an alien who has been residing within the expelling State for some length of time and has established a business there, the home State of the expelled individual is by its right of protection over citizens abroad justified in making diplomatic representations to the expelling State and asking for the reasons for the expulsion. But as in strict law a State can expel even domiciled aliens without so much as giving the reasons, the refusal of the expelling State to supply the reasons for expulsion to the home State of the expelled alien does not constitute an illegal, although a very unfriendly, act. And there is no doubt that every expulsion of an alien without just cause is, in spite of its international legality, an unfriendly act, which can rightfully be met with retorsion.
Just Causes of Expulsion of Aliens.
§ 324. On account of the fact that retorsion might be justified, the question is of importance what just causes of expulsion of aliens there are. As International Law gives no detailed rules regarding expulsion, everything is left to the discretion of the single States and depends upon the merits of the individual case. Theory and practice correctly make a distinction between expulsion in time of war and in time of peace. A belligerent may consider it convenient to expel all enemy subjects residing or temporarily staying within his territory. And, although such a measure may be very hard and cruel, the opinion is general that such expulsion is justifiable.[659] As regards expulsion in time of peace, on the other hand, the opinions of writers as well as of States naturally differ much. Such State as expels an alien will hardly admit not having had a just cause. Some States, as Belgium[660] since 1885, possess Municipal Laws determining just causes for the expulsion of aliens, and such States' discretion concerning expulsion is, of course, more or less restricted. But many States do not possess such laws, and are, therefore, entirely at liberty to consider a cause as justifying expulsion or not. The Institute of International Law at its meeting at Geneva in 1892 adopted a body of forty-one articles concerning the admittance and expulsion of aliens, and in article 28 thereof enumerated nine just causes for expulsion in time of peace.[661] I doubt whether the States will ever come to an agreement about just causes of expulsion. The fact cannot be denied that an alien is more or less a guest in the foreign land, and the question under what conditions such guest makes himself objectionable to his host cannot once for all be answered by the establishment of a body of rules. So much is certain, that with the gradual disappearance of despotic views in the different States, and with the advance of true constitutionalism guaranteeing individual liberty and freedom of opinion and speech, expulsion of aliens, especially for political reasons, will become less frequent. Expulsion will, however, never totally disappear, because it may well be justified. Thus, for example, Prussia after the annexation of the formerly Free Town of Frankfort-on-the-Main, was certainly justified in expelling those individuals who, for the purpose of avoiding military service in the Prussian Army, had by naturalisation become Swiss citizens without giving up their residence at Frankfort.
[659] Thus in 1870, during the Franco-German war, the French expelled all Germans from France, and the former South African Republic expelled in 1899, during the Boer war, almost all British subjects. See below, [vol. II. § 100].
[660] See details in Rivier, I. p. 312.
[661] See Annuaire, XII. p. 223. Many of these causes, as conviction for crimes, for instance, are certainly just causes, but others are doubtful.
Expulsion how effected.
§ 325. Expulsion is, in theory at least, not a punishment, but an administrative measure consisting in an order of the Government directing a foreigner to leave the country. Expulsion must therefore be effected with as much forbearance and indulgence as the circumstances and conditions of the case allow and demand, especially when compulsion is meted out to a domiciled alien. And the home State of the expelled, by its right of protection over its citizens abroad, may well insist upon such forbearance and indulgence. But this is valid as regards the first expulsion only. Should the expelled refuse to leave the territory voluntarily or, after having left, return without authorisation, he may be arrested, punished, and forcibly brought to the frontier.
Reconduction in Contradistinction to Expulsion.