After much negotiation, a constitution was hammered out with some minor changes. For instance, the Malay privileges were now made available to all "Bumiputra", a group comprising the Malays and other indigenous peoples of Malaysia. However, the new states were also granted some autonomy unavailable to the original nine states of Malaya. After negotiations in July 1963, it was agreed that Malaysia would come into being on 31 August 1963, consisting of Singapore, Sabah and Sarawak. Brunei ultimately decided to opt-out of the federation due in part because of an armed revolt by the People's Party ("Parti Rakyat Brunei") which objected to the formation of Malaysia, and the Sultan of Brunei Omar Ali Saifuddien III's demand that he be recognised as the most senior Malay ruler—a demand that was rejected.