- The fact that self-determination is a legal right is, in the 21st century, beyond dispute. It is affirmed in a number of important legal instruments including Articles 1 and 55 of the UN Charter ; common Article 1 of the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights and Article 20 of the African Charter on Human and Peoples’ Rights .
- The right to self-determination is also recognised in two important UN General Assembly resolutions - Resolution 1514 (XV) on the Declaration on the Granting of Independence to Colonial Countries and Peoples and Resolution 2625 (XXV) on the Declaration on Principles of International Law Concerning Friendly Relations and Co-operation among States in Accordance with the Charter of the United Nations. Although UN Resolutions are not considered to create binding legal obligations on States, these two resolutions, and in particular Resolution 2625 are important because they are considered to be declaratory of international law principles.
- It is true, however, that the notion and substantive content of the principle of self-determination is constantly evolving, and this may give rise to some uncertainty in the law. One of the main uncertainties in this regard is establishing who the "peoples" are who are entitled to self-determination e.g. can it include minorities in a State or does it refer only to the "peoples" of the State as a whole. However, simply because the precise legal content of a right is still uncertain and developing does not mean that judiciary must be precluded from considering it.
- Thus section 235 of the Constitution (Act No. 108 of 1996) explicitly recognises the legal right and concept of self-determination by providing that:
"The right of the South African people as a whole to self-determination, as manifested in this Constitution, does not preclude, within the framework of this right, recognition of the notion of the right to self-determination of any community sharing a common cultural and language heritage, within a territorial entity in the Republic or in any other way, determined by national legislation".
The inclusion of the concept in the Constitution clearly indicates that the legislature has not felt it inappropriate to legislate for the concept of self-determination in the past. Moreover, while section 235 does specify the legal framework in which the concept is to be understood, the courts will be required to give substance and application to the general right. In doing so it can be assumed that the courts will consider how the concept of self-determination has been evolving in international law.
- As indicated above, it is also true that the concept of self-determination is somewhat uncertain as it is continuously evolving in international law. However, this could be said for international law as a whole. International law includes codified international law and international customary law. It is easier to establish international law as it has been codified in conventions as there is a written record of the legal principle. It is, however, more difficult to establish what constitutes international customary law. International customary law is consists of two elements (i) consistent and widespread State practice (usus) and the belief that the belief that this prctice is obligatory in terms of a rule of law (opinio juris). As neither of these two elements of international customary law are codified, there is an inherent uncertainty that surrounds them.
- This uncertainty, however is not an insurmountable difficulty and it does not detract from international customary law as a legal concept. This is explicitly recognised in the Constitution (Act No. 108 of 1996). Thus, in section 39 (1)(b) of the Constitution the courts are enjoined to have regard to international law when interpreting the Bill of Rights. In section 232 of the Constitution it is explicitly provided that "Customary international law is law in the Republic unless it is inconsistent with Constitution or an Act of Parliament".
- Thus international law as a whole and international customary law in particular may have elements of uncertainty as the various legal principles are continuously evolving. However, this uncertainty did not deter the legislature from explicitly directing the courts to have regard to international law, and for explicitly providing a legal status for international customary law in the Republic. It therefore cannot be argued that an international law concept such as self-determination could not be included in an Act of Parliament as this contradicts the constitutional principles set out in section 39(1)(b) and section 231(2) of the Constitution.