Justice Zainun Ali in her dissenting Judgment took a diametrically opposing view to that of Justice Raus Sharif's which approach is reflected in the following paragraphs of her grounds: "Customary Land Rights Of The Natives Are Sui Generis [165]In the present appeals, the existence of the customary practices of pemakai menoa and pulau is not disputed. The primary thrust of the appellants' appeals is that such customary practices do not have the force of law. Whilst it is true that 'not all customs have the force of law', it is critical for us to now discover what customs actually have the force of law. [166] Article 160(2) of the Federal Constitution reads: "Law" includes written law, the common law in so far as it is in operation in the Federation or any part thereof, and any custom or usage having the force of law in the Federation or any part thereof; [167]The definition of law under art. 160(2) of the Federal Constitution includes 'customs and usages having the force of law'. This makes customary law an integral part of the legal system in Malaysia. [168]Custom is a source of unwritten law. It must be emphasised that customary law is a traditional common law rule or practice that has become an intrinsic part of the accepted and expected conduct in a community. In Mabo (No.2) the High Court of Australia held that: "The term "native title" conveniently describes the interests and rights of indigenous inhabitants in land, whether communal, group or individual, possessed under the traditional laws acknowledged by and the traditional customs observed by the indigenous inhabitants". [169] As explained by Lord Denning in the case of R v. Secretary of State For Foreign and Commonwealth Affairs; Exparte Indian Association of Alberta [1982] 2 All ER 118: The Indian peoples of Canada have been there from the beginning of time. So they are called the "aboriginal peoples." In the distant past there were many different tribes scattered across the vast territories of Canada. Each tribe had its own tract of land, mountain, river or lake. They got their food by hunting and fishing: and their clothing by trapping for fur. So far as we know they did not till the land. They had their chiefs and headmen to regulate their simple society and to enforce their customs. I say "to enforce their customs", because in early societies custom is the basis of law. Once a custom is established it gives rise to rights and obligations which the chiefs and headmen will enforce. These customary laws are not written down. They are handed down by tradition from one generation to another. Yet beyond doubt they are well established and have the force of law within the community. In England we still have laws which are derived from customs from time immemorial. [170]Native customary rights to land are sui generis. The nature and kind of rights of the natives are embodied in their customary practices. As highlighted by the High Court of Australia in Mabo (No.2) (supra): Native law has its origin in and is given its content by the traditional laws acknowledged by and the traditional customs observed by the indigenous inhabitants of a territory. The nature and incidents of native title must be ascertained as a matter of fact by reference to those laws and customs. (emphasis added)” [171]Thus, in the present appeals, I agree with the view expressed by Abdul Wahab JCA when he held that: Unlike law imposed from above by coercive authority such as a king or a Legislature, native customary law develops from the ground as customs and practices evolve from and in response to changing circumstances and gain general acceptance. In a sense it is direct democracy. These native customary laws traversed a broad range of subjects of communal interest, as the later Adat Iban Order 1993 itself demonstrates. Not all but some of which relate to interest in land. [172]A question then arises, how can a native customary practice attain the force of law? In Tyson v. Smith (1838) 112 ER 1265 Tindal CJ held that: It is an acknowledged principle that, to give validity to a custom, which has been well described to be an usage, which obtains the force of law, and is, in truth, the binding law, within a particular district or at a particular place, of the persons and things which it concerns (see Davy's Reports, 31, 32), it must be certain, reasonable in itself, commencing from time immemorial, and continued without interruption. (emphasis added) [173]In general, for a custom to be regarded as conferring legally enforceable rights, it is essential that such customs be immemorial, certain, reasonable and acceptable by the locality. It has to be consistent and continues to exist from time immemorial in a given community (see also Halsbury's Laws of England 4th edn, (1975-vol.12). [174]A custom must not be against humanity, morality and public policy. Therefore a custom upheld by the court must be reasonable. The court has a duty to examine whether or not a custom is reasonable having regard to the facts and circumstances of each case (Nagammal v. Suppiah [1940] 1 LNS 60; [1940] 1 MLJ 119, Tyson v. Smith (supra) and Mercer v. Denne [1905] 2 Ch 538 (Court of Appeal). As expressed by Tindal CJ in Tyson v. Smith (supra): The question, what customs are reasonable and what are not, is one upon which the books are not altogether silent. A custom is not unreasonable merely because it is contrary to a particular maxim or rule of the common law, for "consuetudo ex certa causa rationabili usitata privat communem legem " (Co. Litt. 113 a.), as the custom of gavelkind and borough English, which are directly contrary to the law of descent, or, again, the custom of Kent, which is contrary to the law of escheats. Nor is a custom unreasonable because it is prejudicial to the interests of a private man, if it be for the benefit of the commonwealth, as the custom to turn the plough upon the headland of another, in favour of husbandry, or to dry nets on the land of another, in favour of fishing and for the benefit of navigation. But, on the other hand, a custom that is contrary to the public good, or injurious or prejudicial to the many, and beneficial only to some particular person, is repugnant to the law of reason; for it could not have had a reasonable commencement... (emphasis added)”