The individual in international law — In general — Position of individuals in international law — Human rights and freedoms — Freedom of entry — Right of entry into Federal Republic of Germany — Whether extending to Germans domiciled in German Democratic Republic — Federal Basic Law 1949, Articles 11 and 116 — Effect of Treaty on Basis of Relations between Federal Republic and German Democratic Republic, 1972 — Freedom of emigration — Guarantees — Fourth Protocol to European Convention on Human Rights, 1963, Article 2(2) — International Covenant on Civil and Political Rights, 1966, Article 12(2) — Whether legislation of German Democratic Republic prohibiting free exit part of municipal law of Federal Republic — Transit Agreement between Federal Republic of Germany and German Democratic Republic, 1971 — Whether creates rights and duties for individuals — Whether contract for payment in return for assistance to escape from German Democratic Republic enforceable in courts of Federal Republic — The law of the Federal Republic of Germany