Chapter 1
Definitions, Objects and Interpretation of an Act (ss 1-3)
2 Applicable law
In addition to the Constitution and the law, any competent court in the Republic hearing any matter arising from the application of this Act must also consider and, where, appropriate, may apply-
(a) conventional international law, and in particular the Statute;
(b) customary international law; and
(c) comparable foreign law.
Applicability
Unique provision - substantive law
Customary international law
EDIT.