The individual in international law — Aliens — Admission of — Entitlement to residence permit — “Family members” of resident foreign workers — Definition — Federal Republic of Germany-Spain Treaty of Establishment, 1970, Article 2(2) — The law of the Federal Republic of Germany

Treaties — Interpretation of — Principles and rules of interpretation — Term used but not defined in bilateral treaty — Restrictive interpretation — Interpretation by reference to purpose of treaty — Term “family members” — Which members of family covered — Federal Republic of Germany-Spain Treaty on Establishment, 1970, Article 2(2) — Entitlement of aliens to residence permit — The law of the Federal Republic of Germany