international law and municipal law 185
sovereign states on the plane of international law’.
295
However, the rule is
not absolute.
296
The courts are willing to look at the terms of an unin-
corporated treaty in specific situations: first, as noted above, in order to
ascertain certain facts such as the existence and terms of, and the parties
to, a treaty or where the treaty in question is incorporated into a contract
or referred to in domestic legislation and is necessary to a particular deci-
sion, and secondly, where the national courts have to adjudicate upon the
interpretation of a particular international treaty in order to determine
private rights and obligations under domestic law.
297
The latter proposi-
tion would operate, for example, with regard to extradition and asylum
cases where a view has to be taken with regard to the Geneva Convention
Relating to the Status of Refugees, 1951 as a result of domestic legisla-
tion, the Asylum and Immigration Act 1996.
298
In Republic of Ecuador v.
Occidental Exploration and Production Co., the Court of Appeal, while
affirming this principle, emphasised that context was always important,
so that a treaty intended by its signatories to give rise to rights in favour
of private investors capable of enforcement under the treaty in consen-
sual arbitration against one or other of its signatory states in domestic
proceedings would fall within this exception and thus be justiciable.
299
The exception to non-justiciability laid down in the CND and Occidental
cases was reaffirmed in In the Matter of AY Bank Ltd,
300
where it was held
that the right to prove in the liquidation of a joint venture bank in the
UK (involving the National Bank of Yugoslavia), upon the dissolution of
the Federal Republic of Yugoslavia and its National Bank and consequen-
tial apportionment among the successor states, arose in domestic law, so
295
[2006] UKHL 16, para. 30; 132 ILR, p. 684. See also R (Islamic Human Rights Commission)
v. CAA [2006] EWHC2465; 132 ILR, p. 707, and R (Gentle) v. Prime Minister[2008] UKHL
20, above, p. 181, note 272.
296
See Lord Oliver in JH Rayner (Mincing Lane) Ltd v. Department of Trade and Industry
[1990] 2 AC 418, 500. Lord Steyn in Kuwait Airways Corporation v. Iraqi Airways Co. (Nos.
4 and 5) [2002] 2 AC 883, 1101 considered that the principle was not ‘a categorical rule’.
See also Fatima, Using International Law, pp. 273 ff.
297
See e.g. CND v. Prime Minister [2002] EWHC 2777 (Admin), paras. 35–6 (Simon Brown
LJ) and 61(iii) (Richards J).
298
See e.g. Ex parte Adan [2000] UKHL 67.
299
[2005] EWCA Cic 1116, paras. 31 and 37. Mance LJ went on to say that ‘For the English
Court to treat the extent of such rights as non-justiciable would appear to us to involve
an extension, rather than an application, of existing doctrines developed in different
contexts’, ibid. See also paras. 39–42. Somewhat confusingly, Mance LJ concluded that the
doctrine of non-justiciability could not be ousted by consent, ibid., para. 57.
300
[2006] EWHC 830 (Ch), paras. 51 ff. See also R v. Director of the Serious Fraud Office and
BAE Systems [2008] EWHC 714 (Admin), paras. 118–20.