Sayyadina Abdullah ibn Abbas said that "Whatever the Qur'an termed as Halal is Halal and whatever it deemed Haram is Haram and about which it remained silent, this is forgiven" (Abu Dawud Vol 2). Hence, to say that something is Haram without it being deemed as Haram is wrong. Shah Abdul Haq Dehlwi, pioneer of the science of hadith in the subcontinent, says in relation to the above hadith that: "The reason why ibn Abbas recited this was to let it be known that something can only become Haram by way of revelation and it was not permitted to make anything Haram through ones own desires"(Ash'atul Lum'aat Vol 3).
Therefore, to say that anything is Haram without there being revelation about it is incorrect in itself. Allah also says "Who has forbidden the adornment with clothes given by Allah which he has produced for His slaves and the pure foods? (7:32). This verse again reveals that no person today has the right to declare a pure item Haram. Prohibition is only proven through revelation.
I don't understand why Malaysia still didn't acknowledge Brunei's finding in this matter though they know that Brunei is an Islamic country and Brunei is our neighbour.