Peace talks between the southern rebels and the government made substantial progress in 2003 and early 2004, although skirmishes in parts of the south have reportedly continued. The two sides have agreed that, following a final peace treaty, southern Sudan will enjoy autonomy for six years, and after the expiration of that period, the people of southern Sudan will be able to vote in a referendum on independence. Furthermore, oil revenues will be divided equally between the government and rebels during the six-year interim period. The ability or willingness of the government to fulfil these promises has been questioned by some observers, however, and the status of three central and eastern provinces was a point of contention in the negotiations. Some observers wondered whether hard line elements in the north would allow the treaty to proceed.