'From these decisions I have drawn the following conclusions as to the approach of the Commission and the European Court of Human Rights to the potential conflict between the respect for family life and the enforcement of immigration controls: (i) A state has the right under international law to control the entry of non-nationals into its territory, subject always to its treaty obligations. (ii) Article 8 does not impose on a State any general obligation to respect the choice of residence of a married couple. (iii) Removal or exclusion of one family member from the State where the other members of the family are lawfully resident, will not necessarily infringe Article 8, provided there are no insurmountable obstacles for the family living together in the country of origin of the family members excluded, even though this involves a degree of hardship for some or all members of the family. (iv) Article 8 is unlikely to be violated by the expulsion of a member of a family that has been long established in a State if the circumstances are such that it is not reasonable to expect the other members of the family to follow that member expelled. (v) Knowledge on the part of one spouse at the time of marriage that the rights of residence of the other were precarious, militates against a finding that an order excluding the latter spouse violates Article 8. (vi) Whether interference with family rights is justified in the interest of controlling immigration will depend on (1) The facts of the particular case and (2) The circumstances prevailing in the state whose action is impugned.'